77922125172 has 24 divisors (see below), whose sum is σ = 202020324800. Its totient is φ = 25974041688.

The previous prime is 77922125137. The next prime is 77922125213. The reversal of 77922125172 is 27152122977.

It is a congruent 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, 360750472 + ... + 360750687.

Almost surely, 2^77922125172 is an apocalyptic number.

It is an amenable number.

77922125172 is an abundant number, since it is smaller than the sum of its proper divisors (124098199628).

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

77922125172 is a wasteful number, since it uses less digits than its factorization.

77922125172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 721501172 (or 721501164 counting only the distinct ones).

The product of its digits is 246960, while the sum is 45.

The spelling of 77922125172 in words is "seventy-seven billion, nine hundred twenty-two million, one hundred twenty-five thousand, one hundred seventy-two".