7972111961 has 8 divisors (see below), whose sum is σ = 8705379648. Its totient is φ = 7240266000.

The previous prime is 7972111951. The next prime is 7972111969. The reversal of 7972111961 is 1691112797.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 7972111961 - 2²⁶ = 7905003097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7972111969) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 343685 + ... + 366146.

It is an arithmetic number, because the mean of its divisors is an integer number (1088172456).

Almost surely, 2^7972111961 is an apocalyptic number.

It is an amenable number.

7972111961 is a deficient number, since it is larger than the sum of its proper divisors (733267687).

7972111961 is a wasteful number, since it uses less digits than its factorization.

7972111961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 710863.

The product of its digits is 47628, while the sum is 44.

The square root of 7972111961 is about 89286.6841191899. The cubic root of 7972111961 is about 1997.6732910123.

The spelling of 7972111961 in words is "seven billion, nine hundred seventy-two million, one hundred eleven thousand, nine hundred sixty-one".