68355978180 has 96 divisors (see below), whose sum is σ = 224074287360. Its totient is φ = 15243141120.

The previous prime is 68355978169. The next prime is 68355978209. The reversal of 68355978180 is 8187955386.

It is a super-2 number, since 2×68355978180² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (60).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1967565 + ... + 2002004.

It is an arithmetic number, because the mean of its divisors is an integer number (2334107160).

Almost surely, 2^68355978180 is an apocalyptic number.

68355978180 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

68355978180 is an abundant number, since it is smaller than the sum of its proper divisors (155718309180).

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

68355978180 is a wasteful number, since it uses less digits than its factorization.

68355978180 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3969629 (or 3969627 counting only the distinct ones).

The product of its (nonzero) digits is 14515200, while the sum is 60.

The spelling of 68355978180 in words is "sixty-eight billion, three hundred fifty-five million, nine hundred seventy-eight thousand, one hundred eighty".