68397778760 has 32 divisors (see below), whose sum is σ = 158859360000. Its totient is φ = 26476559040.

The previous prime is 68397778747. The next prime is 68397778807. The reversal of 68397778760 is 6787779386.

It is a super-2 number, since 2×68397778760² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27578510 + ... + 27580989.

It is an arithmetic number, because the mean of its divisors is an integer number (4964355000).

Almost surely, 2^68397778760 is an apocalyptic number.

It is an amenable number.

68397778760 is an abundant number, since it is smaller than the sum of its proper divisors (90461581240).

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

68397778760 is a wasteful number, since it uses less digits than its factorization.

68397778760 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55159541 (or 55159537 counting only the distinct ones).

The product of its (nonzero) digits is 149361408, while the sum is 68.

The spelling of 68397778760 in words is "sixty-eight billion, three hundred ninety-seven million, seven hundred seventy-eight thousand, seven hundred sixty".