7972812990981 has 12 divisors (see below), whose sum is σ = 11516868525760. Its totient is φ = 5314939540200.

The previous prime is 7972812990931. The next prime is 7972812991037. The reversal of 7972812990981 is 1890992182797.

It is not a de Polignac number, because 7972812990981 - 2¹⁵ = 7972812958213 is a prime.

It is a super-2 number, since 2×7972812990981² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7972812990931) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 22238995 + ... + 22594656.

Almost surely, 2^{7972812990981} is an apocalyptic number.

It is an amenable number.

7972812990981 is a deficient number, since it is larger than the sum of its proper divisors (3544055534779).

7972812990981 is a wasteful number, since it uses less digits than its factorization.

7972812990981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44853416 (or 44853413 counting only the distinct ones).

The product of its (nonzero) digits is 82301184, while the sum is 72.

The spelling of 7972812990981 in words is "seven trillion, nine hundred seventy-two billion, eight hundred twelve million, nine hundred ninety thousand, nine hundred eighty-one".