656124313212 has 72 divisors (see below), whose sum is σ = 1756650941136. Its totient is φ = 205778041344.

The previous prime is 656124313157. The next prime is 656124313213. The reversal of 656124313212 is 212313421656.

656124313212 is a `hidden beast` number, since 6 + 5 + 6 + 1 + 2 + 431 + 3 + 212 = 666.

656124313212 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×656124313212² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (656124313213) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1792878 + ... + 2127594.

It is an arithmetic number, because the mean of its divisors is an integer number (24397929738).

Almost surely, 2^656124313212 is an apocalyptic number.

It is an amenable number.

656124313212 is an abundant number, since it is smaller than the sum of its proper divisors (1100526627924).

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

656124313212 is a wasteful number, since it uses less digits than its factorization.

656124313212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 337947 (or 337942 counting only the distinct ones).

The product of its digits is 51840, while the sum is 36.

Adding to 656124313212 its reverse (212313421656), we get a palindrome (868437734868).

The spelling of 656124313212 in words is "six hundred fifty-six billion, one hundred twenty-four million, three hundred thirteen thousand, two hundred twelve".