656212545252 has 288 divisors, whose sum is σ = 1991555040384. Its totient is φ = 179897241600.

The previous prime is 656212545217. The next prime is 656212545253. The reversal of 656212545252 is 252545212656.

656212545252 is a `hidden beast` number, since 6 + 5 + 62 + 12 + 54 + 525 + 2 = 666.

It is a super-2 number, since 2×656212545252² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 656212545198 and 656212545207.

It is not an unprimeable number, because it can be changed into a prime (656212545253) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 20658102 + ... + 20689842.

It is an arithmetic number, because the mean of its divisors is an integer number (6915121668).

Almost surely, 2^656212545252 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 656212545252, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (995777520192).

656212545252 is an abundant number, since it is smaller than the sum of its proper divisors (1335342495132).

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

656212545252 is a wasteful number, since it uses less digits than its factorization.

656212545252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31899 (or 31894 counting only the distinct ones).

The product of its digits is 1440000, while the sum is 45.

The spelling of 656212545252 in words is "six hundred fifty-six billion, two hundred twelve million, five hundred forty-five thousand, two hundred fifty-two".