9977372972 has 24 divisors (see below), whose sum is σ = 19959389184. Its totient is φ = 4275022032.

The previous prime is 9977372963. The next prime is 9977372987. The reversal of 9977372972 is 2792737799.

It is a super-2 number, since 2×9977372972² (a number of 21 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (62) coincides with the sum of the digits of its prime factors.

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, 88133 + ... + 166499.

It is an arithmetic number, because the mean of its divisors is an integer number (831641216).

Almost surely, 2^9977372972 is an apocalyptic number.

It is an amenable number.

9977372972 is an abundant number, since it is smaller than the sum of its proper divisors (9982016212).

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

9977372972 is a wasteful number, since it uses less digits than its factorization.

9977372972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82925 (or 82923 counting only the distinct ones).

The product of its digits is 21003948, while the sum is 62.

The square root of 9977372972 is about 99886.8007896939. The cubic root of 9977372972 is about 2152.8085144286.

The spelling of 9977372972 in words is "nine billion, nine hundred seventy-seven million, three hundred seventy-two thousand, nine hundred seventy-two".