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68704720600 = 23524314835387
BaseRepresentation
bin111111111111000111…
…101101011011011000
320120100011001102120111
4333333013231123120
52111201402024400
651321300334104
74651365326605
oct777707553330
9216304042514
1068704720600
112715702952a
12113950a4334
13662bca3239
14347a9a36ac
151bc1a543ba
hexfff1ed6d8

68704720600 has 96 divisors (see below), whose sum is σ = 163593904320. Its totient is φ = 26819694720.

The previous prime is 68704720583. The next prime is 68704720603. The reversal of 68704720600 is 602740786.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68704720603) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12751107 + ... + 12756493.

It is an arithmetic number, because the mean of its divisors is an integer number (1704103170).

Almost surely, 268704720600 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 68704720600, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (81796952160).

68704720600 is an abundant number, since it is smaller than the sum of its proper divisors (94889183720).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

68704720600 is a wasteful number, since it uses less digits than its factorization.

68704720600 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6929 (or 6920 counting only the distinct ones).

The product of its (nonzero) digits is 112896, while the sum is 40.

The spelling of 68704720600 in words is "sixty-eight billion, seven hundred four million, seven hundred twenty thousand, six hundred".

Divisors: 1 2 4 5 8 10 20 25 40 43 50 86 100 172 200 215 344 430 860 1075 1483 1720 2150 2966 4300 5387 5932 7415 8600 10774 11864 14830 21548 26935 29660 37075 43096 53870 59320 63769 74150 107740 127538 134675 148300 215480 231641 255076 269350 296600 318845 463282 510152 538700 637690 926564 1077400 1158205 1275380 1594225 1853128 2316410 2550760 3188450 4632820 5791025 6376900 7988921 9265640 11582050 12753800 15977842 23164100 31955684 39944605 46328200 63911368 79889210 159778420 199723025 319556840 343523603 399446050 687047206 798892100 1374094412 1597784200 1717618015 2748188824 3435236030 6870472060 8588090075 13740944120 17176180150 34352360300 68704720600