77995612020 has 48 divisors (see below), whose sum is σ = 218481395328. Its totient is φ = 20789907840.

The previous prime is 77995611983. The next prime is 77995612073. The reversal of 77995612020 is 2021659977.

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, 137184 + ... + 418103.

It is an arithmetic number, because the mean of its divisors is an integer number (4551695736).

Almost surely, 2^77995612020 is an apocalyptic number.

It is an amenable number.

77995612020 is an abundant number, since it is smaller than the sum of its proper divisors (140485783308).

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

77995612020 is a wasteful number, since it uses less digits than its factorization.

77995612020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 557640 (or 557638 counting only the distinct ones).

The product of its (nonzero) digits is 476280, while the sum is 48.

The spelling of 77995612020 in words is "seventy-seven billion, nine hundred ninety-five million, six hundred twelve thousand, twenty".