77531711632 has 20 divisors (see below), whose sum is σ = 156748896000. Its totient is φ = 37080383648.

The previous prime is 77531711573. The next prime is 77531711639. The reversal of 77531711632 is 23611713577.

It is a super-2 number, since 2×77531711632² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (77531711639) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 105341632 + ... + 105342367.

It is an arithmetic number, because the mean of its divisors is an integer number (7837444800).

Almost surely, 2^77531711632 is an apocalyptic number.

It is an amenable number.

77531711632 is an abundant number, since it is smaller than the sum of its proper divisors (79217184368).

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

77531711632 is a wasteful number, since it uses less digits than its factorization.

77531711632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210684030 (or 210684024 counting only the distinct ones).

The product of its digits is 185220, while the sum is 43.

The spelling of 77531711632 in words is "seventy-seven billion, five hundred thirty-one million, seven hundred eleven thousand, six hundred thirty-two".