77757556264564 has 48 divisors (see below), whose sum is σ = 150883149860352. Its totient is φ = 34764153840000.

The previous prime is 77757556264543. The next prime is 77757556264571. The reversal of 77757556264564 is 46546265575777.

It is a happy number.

It is a super-2 number, since 2×77757556264564² (a number of 29 digits) contains 22 as substring.

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, 129985629 + ... + 130582459.

It is an arithmetic number, because the mean of its divisors is an integer number (3143398955424).

Almost surely, 2^{77757556264564} is an apocalyptic number.

It is an amenable number.

77757556264564 is a deficient number, since it is larger than the sum of its proper divisors (73125593595788).

77757556264564 is a wasteful number, since it uses less digits than its factorization.

77757556264564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 645448 (or 645446 counting only the distinct ones).

The product of its digits is 10372320000, while the sum is 76.

The spelling of 77757556264564 in words is "seventy-seven trillion, seven hundred fifty-seven billion, five hundred fifty-six million, two hundred sixty-four thousand, five hundred sixty-four".