68172668816 has 40 divisors (see below), whose sum is σ = 151879904064. Its totient is φ = 29037605760.

The previous prime is 68172668803. The next prime is 68172668869. The reversal of 68172668816 is 61886627186.

It is a happy number.

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, 1848875 + ... + 1885386.

Almost surely, 2^68172668816 is an apocalyptic number.

It is an amenable number.

68172668816 is an abundant number, since it is smaller than the sum of its proper divisors (83707235248).

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

68172668816 is a wasteful number, since it uses less digits than its factorization.

68172668816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3734439 (or 3734433 counting only the distinct ones).

The product of its digits is 9289728, while the sum is 59.

The spelling of 68172668816 in words is "sixty-eight billion, one hundred seventy-two million, six hundred sixty-eight thousand, eight hundred sixteen".