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68785539800 = 2352615638159
BaseRepresentation
bin100000000001111110…
…0000000101011011000
320120112210010110200012
41000003330000223120
52111333044233200
651333304501052
74653366304235
oct1000374005330
9216483113605
1068785539800
112719870a15a
12113b817a788
13664295c453
14348760078c
151bc8bbaa35
hex1003f00ad8

68785539800 has 48 divisors (see below), whose sum is σ = 162548152800. Its totient is φ = 27063158400.

The previous prime is 68785539787. The next prime is 68785539803. The reversal of 68785539800 is 893558786.

It is a self number, because there is not a number n which added to its sum of digits gives 68785539800.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68785539803) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2806880 + ... + 2831279.

It is an arithmetic number, because the mean of its divisors is an integer number (3386419850).

Almost surely, 268785539800 is an apocalyptic number.

It is an amenable number.

68785539800 is an abundant number, since it is smaller than the sum of its proper divisors (93762613000).

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

68785539800 is a wasteful number, since it uses less digits than its factorization.

68785539800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5638236 (or 5638227 counting only the distinct ones).

The product of its (nonzero) digits is 14515200, while the sum is 59.

The spelling of 68785539800 in words is "sixty-eight billion, seven hundred eighty-five million, five hundred thirty-nine thousand, eight hundred".

Divisors: 1 2 4 5 8 10 20 25 40 50 61 100 122 200 244 305 488 610 1220 1525 2440 3050 6100 12200 5638159 11276318 22552636 28190795 45105272 56381590 112763180 140953975 225526360 281907950 343927699 563815900 687855398 1127631800 1375710796 1719638495 2751421592 3439276990 6878553980 8598192475 13757107960 17196384950 34392769900 68785539800