77457776732 has 24 divisors (see below), whose sum is σ = 154936664064. Its totient is φ = 33191666352.

The previous prime is 77457776723. The next prime is 77457776749. The reversal of 77457776732 is 23767775477.

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, 24893 + ... + 394379.

It is an arithmetic number, because the mean of its divisors is an integer number (6455694336).

Almost surely, 2^77457776732 is an apocalyptic number.

It is an amenable number.

77457776732 is an abundant number, since it is smaller than the sum of its proper divisors (77478887332).

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

77457776732 is a wasteful number, since it uses less digits than its factorization.

77457776732 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 376985 (or 376983 counting only the distinct ones).

The product of its digits is 84707280, while the sum is 62.

The spelling of 77457776732 in words is "seventy-seven billion, four hundred fifty-seven million, seven hundred seventy-six thousand, seven hundred thirty-two".