71612640624 has 80 divisors (see below), whose sum is σ = 223864743168. Its totient is φ = 19257179136.

The previous prime is 71612640613. The next prime is 71612640653. The reversal of 71612640624 is 42604621617.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6262902 + ... + 6274325.

Almost surely, 2^71612640624 is an apocalyptic number.

It is an amenable number.

71612640624 is an abundant number, since it is smaller than the sum of its proper divisors (152252102544).

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

71612640624 is a wasteful number, since it uses less digits than its factorization.

71612640624 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12537262 (or 12537256 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 39.

The spelling of 71612640624 in words is "seventy-one billion, six hundred twelve million, six hundred forty thousand, six hundred twenty-four".