971987915364 has 12 divisors (see below), whose sum is σ = 2267971802544. Its totient is φ = 323995971784.

The previous prime is 971987915333. The next prime is 971987915387. The reversal of 971987915364 is 463519789179.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×971987915364² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40499496462 + ... + 40499496485.

It is an arithmetic number, because the mean of its divisors is an integer number (188997650212).

Almost surely, 2^971987915364 is an apocalyptic number.

It is an amenable number.

971987915364 is an abundant number, since it is smaller than the sum of its proper divisors (1295983887180).

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

971987915364 is a wasteful number, since it uses less digits than its factorization.

971987915364 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80998992954 (or 80998992952 counting only the distinct ones).

The product of its digits is 102876480, while the sum is 69.

The spelling of 971987915364 in words is "nine hundred seventy-one billion, nine hundred eighty-seven million, nine hundred fifteen thousand, three hundred sixty-four".