656212545254 has 32 divisors (see below), whose sum is σ = 1127505545280. Its totient is φ = 280592036352.

The previous prime is 656212545253. The next prime is 656212545379. The reversal of 656212545254 is 452545212656.

It is a super-2 number, since 2×656212545254² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 656212545199 and 656212545208.

It is a congruent number.

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

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15855572 + ... + 15896904.

It is an arithmetic number, because the mean of its divisors is an integer number (35234548290).

Almost surely, 2^656212545254 is an apocalyptic number.

656212545254 is a deficient number, since it is larger than the sum of its proper divisors (471293000026).

656212545254 is a wasteful number, since it uses less digits than its factorization.

656212545254 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43904.

The product of its digits is 2880000, while the sum is 47.

The spelling of 656212545254 in words is "six hundred fifty-six billion, two hundred twelve million, five hundred forty-five thousand, two hundred fifty-four".