68172405632 has 32 divisors (see below), whose sum is σ = 140495401800. Its totient is φ = 32910814720.

The previous prime is 68172405611. The next prime is 68172405647. The reversal of 68172405632 is 23650427186.

It is a tau number, because it is divible by the number of its divisors (32).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9178994 + ... + 9186417.

Almost surely, 2^68172405632 is an apocalyptic number.

It is an amenable number.

68172405632 is an abundant number, since it is smaller than the sum of its proper divisors (72322996168).

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

68172405632 is a wasteful number, since it uses less digits than its factorization.

68172405632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18365454 (or 18365442 counting only the distinct ones).

The product of its (nonzero) digits is 483840, while the sum is 44.

The spelling of 68172405632 in words is "sixty-eight billion, one hundred seventy-two million, four hundred five thousand, six hundred thirty-two".