977899994772 has 24 divisors (see below), whose sum is σ = 2287787157600. Its totient is φ = 325106593056.

The previous prime is 977899994711. The next prime is 977899994789. The reversal of 977899994772 is 277499998779.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 107504247 + ... + 107513342.

It is an arithmetic number, because the mean of its divisors is an integer number (95324464900).

Almost surely, 2^977899994772 is an apocalyptic number.

It is an amenable number.

977899994772 is an abundant number, since it is smaller than the sum of its proper divisors (1309887162828).

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

977899994772 is a wasteful number, since it uses less digits than its factorization.

977899994772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 215017975 (or 215017973 counting only the distinct ones).

The product of its digits is 9073705536, while the sum is 87.

The spelling of 977899994772 in words is "nine hundred seventy-seven billion, eight hundred ninety-nine million, nine hundred ninety-four thousand, seven hundred seventy-two".