77913544988 has 6 divisors (see below), whose sum is σ = 136348703736. Its totient is φ = 38956772492.

The previous prime is 77913544963. The next prime is 77913545029. The reversal of 77913544988 is 88944531977.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9739193120 + ... + 9739193127.

It is an arithmetic number, because the mean of its divisors is an integer number (22724783956).

Almost surely, 2^77913544988 is an apocalyptic number.

It is an amenable number.

77913544988 is a deficient number, since it is larger than the sum of its proper divisors (58435158748).

77913544988 is a wasteful number, since it uses less digits than its factorization.

77913544988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19478386251 (or 19478386249 counting only the distinct ones).

The product of its digits is 60963840, while the sum is 65.

The spelling of 77913544988 in words is "seventy-seven billion, nine hundred thirteen million, five hundred forty-four thousand, nine hundred eighty-eight".