2161130623972 has 24 divisors (see below), whose sum is σ = 3801204650880. Its totient is φ = 1075080252960.

The previous prime is 2161130623933. The next prime is 2161130623973. The reversal of 2161130623972 is 2793260311612.

It is a super-2 number, since 2×2161130623972² (a number of 25 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (43) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (2161130623973) 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, 55947 + ... + 2079757.

It is an arithmetic number, because the mean of its divisors is an integer number (158383527120).

Almost surely, 2^{2161130623972} is an apocalyptic number.

It is an amenable number.

2161130623972 is a deficient number, since it is larger than the sum of its proper divisors (1640074026908).

2161130623972 is a wasteful number, since it uses less digits than its factorization.

2161130623972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2025171 (or 2025169 counting only the distinct ones).

The product of its (nonzero) digits is 163296, while the sum is 43.

The spelling of 2161130623972 in words is "two trillion, one hundred sixty-one billion, one hundred thirty million, six hundred twenty-three thousand, nine hundred seventy-two".