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68880361651200 = 21036521134759
BaseRepresentation
bin11111010100101011101010…
…11111001111110000000000
3100000212220020211112112000000
433222111311133033300000
533012013440040314300
6402255111252000000
720336304400503201
oct1752256537176000
9300786224475000
1068880361651200
111aa46aa7499000
127885585900000
132c5850c4592c8
141301b821375a8
157e6b09e14c00
hex3ea5757cfc00

68880361651200 has 3696 divisors, whose sum is σ = 292437634936320. Its totient is φ = 16065987379200.

The previous prime is 68880361651151. The next prime is 68880361651261. The reversal of 68880361651200 is 215616308886.

68880361651200 is a `hidden beast` number, since 6 + 8 + 8 + 8 + 0 + 3 + 616 + 5 + 12 + 0 + 0 = 666.

It is a super-2 number, since 2×688803616512002 (a number of 28 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 335 ways as a sum of consecutive naturals, for example, 1167463756771 + ... + 1167463756829.

Almost surely, 268880361651200 is an apocalyptic number.

68880361651200 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 68880361651200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (146218817468160).

68880361651200 is an abundant number, since it is smaller than the sum of its proper divisors (223557273285120).

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

68880361651200 is an equidigital number, since it uses as much as digits as its factorization.

68880361651200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 187 (or 127 counting only the distinct ones).

The product of its (nonzero) digits is 3317760, while the sum is 54.

The spelling of 68880361651200 in words is "sixty-eight trillion, eight hundred eighty billion, three hundred sixty-one million, six hundred fifty-one thousand, two hundred".