653156631972 has 144 divisors (see below), whose sum is σ = 1818035914240. Its totient is φ = 196499706624.

The previous prime is 653156631857. The next prime is 653156631977. The reversal of 653156631972 is 279136651356.

653156631972 is a `hidden beast` number, since 6 + 5 + 3 + 1 + 566 + 3 + 1 + 9 + 72 = 666.

It is a super-2 number, since 2×653156631972² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (653156631977) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3722358 + ... + 3893874.

Almost surely, 2^653156631972 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 653156631972, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (909017957120).

653156631972 is an abundant number, since it is smaller than the sum of its proper divisors (1164879282268).

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

653156631972 is a wasteful number, since it uses less digits than its factorization.

653156631972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171722 (or 171717 counting only the distinct ones).

The product of its digits is 6123600, while the sum is 54.

The spelling of 653156631972 in words is "six hundred fifty-three billion, one hundred fifty-six million, six hundred thirty-one thousand, nine hundred seventy-two".