77057947776 has 64 divisors (see below), whose sum is σ = 205500909600. Its totient is φ = 25583616000.

The previous prime is 77057947753. The next prime is 77057947787. The reversal of 77057947776 is 67774975077.

It is a tau number, because it is divible by the number of its divisors (64).

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, 303361 + ... + 496128.

Almost surely, 2^77057947776 is an apocalyptic number.

It is an amenable number.

77057947776 is an abundant number, since it is smaller than the sum of its proper divisors (128442961824).

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

77057947776 is a wasteful number, since it uses less digits than its factorization.

77057947776 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 799757 (or 799745 counting only the distinct ones).

The product of its (nonzero) digits is 127060920, while the sum is 66.

The spelling of 77057947776 in words is "seventy-seven billion, fifty-seven million, nine hundred forty-seven thousand, seven hundred seventy-six".