77662389056 has 56 divisors (see below), whose sum is σ = 180887437056. Its totient is φ = 32384309760.

The previous prime is 77662389047. The next prime is 77662389083. The reversal of 77662389056 is 65098326677.

It is a tau number, because it is divible by the number of its divisors (56).

It is a super-2 number, since 2×77662389056² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 77662388986 and 77662389004.

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, 2326040 + ... + 2359191.

Almost surely, 2^77662389056 is an apocalyptic number.

It is an amenable number.

77662389056 is an abundant number, since it is smaller than the sum of its proper divisors (103225048000).

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

77662389056 is a wasteful number, since it uses less digits than its factorization.

77662389056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4685287 (or 4685277 counting only the distinct ones).

The product of its (nonzero) digits is 22861440, while the sum is 59.

The spelling of 77662389056 in words is "seventy-seven billion, six hundred sixty-two million, three hundred eighty-nine thousand, fifty-six".