77564637632 has 28 divisors (see below), whose sum is σ = 154589485080. Its totient is φ = 38612956416.

The previous prime is 77564637617. The next prime is 77564637643. The reversal of 77564637632 is 23673646577.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2631518 + ... + 2660829.

Almost surely, 2^77564637632 is an apocalyptic number.

It is an amenable number.

77564637632 is a deficient number, since it is larger than the sum of its proper divisors (77024847448).

77564637632 is a wasteful number, since it uses less digits than its factorization.

77564637632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5292588 (or 5292578 counting only the distinct ones).

The product of its digits is 26671680, while the sum is 56.

The spelling of 77564637632 in words is "seventy-seven billion, five hundred sixty-four million, six hundred thirty-seven thousand, six hundred thirty-two".