7977880904 has 64 divisors (see below), whose sum is σ = 18470592000. Its totient is φ = 3217949952.

The previous prime is 7977880903. The next prime is 7977880943. The reversal of 7977880904 is 4090887797.

It is not an unprimeable number, because it can be changed into a prime (7977880903) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38864 + ... + 132159.

It is an arithmetic number, because the mean of its divisors is an integer number (288603000).

Almost surely, 2^7977880904 is an apocalyptic number.

It is an amenable number.

7977880904 is an abundant number, since it is smaller than the sum of its proper divisors (10492711096).

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

7977880904 is a wasteful number, since it uses less digits than its factorization.

7977880904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171067 (or 171049 counting only the distinct ones).

The product of its (nonzero) digits is 7112448, while the sum is 59.

The square root of 7977880904 is about 89318.9840067608. The cubic root of 7977880904 is about 1998.1550405857.

The spelling of 7977880904 in words is "seven billion, nine hundred seventy-seven million, eight hundred eighty thousand, nine hundred four".