77739473172 has 48 divisors (see below), whose sum is σ = 182875062272. Its totient is φ = 25701429600.

The previous prime is 77739473167. The next prime is 77739473209. The reversal of 77739473172 is 27137493777.

It is a happy number.

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, 7540173 + ... + 7550475.

Almost surely, 2^77739473172 is an apocalyptic number.

It is an amenable number.

77739473172 is an abundant number, since it is smaller than the sum of its proper divisors (105135589100).

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

77739473172 is a wasteful number, since it uses less digits than its factorization.

77739473172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15388 (or 15386 counting only the distinct ones).

The product of its digits is 10890936, while the sum is 57.

The spelling of 77739473172 in words is "seventy-seven billion, seven hundred thirty-nine million, four hundred seventy-three thousand, one hundred seventy-two".