656212444013 has 16 divisors (see below), whose sum is σ = 753665393280. Its totient is φ = 559687665600.

The previous prime is 656212444009. The next prime is 656212444049. The reversal of 656212444013 is 310444212656.

656212444013 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 656212444013 - 2² = 656212444009 is a prime.

It is a super-2 number, since 2×656212444013² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (656212444073) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7621343 + ... + 7706963.

It is an arithmetic number, because the mean of its divisors is an integer number (47104087080).

Almost surely, 2^656212444013 is an apocalyptic number.

It is an amenable number.

656212444013 is a deficient number, since it is larger than the sum of its proper divisors (97452949267).

656212444013 is a wasteful number, since it uses less digits than its factorization.

656212444013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91028.

The product of its (nonzero) digits is 138240, while the sum is 38.

Adding to 656212444013 its reverse (310444212656), we get a palindrome (966656656669).

The spelling of 656212444013 in words is "six hundred fifty-six billion, two hundred twelve million, four hundred forty-four thousand, thirteen".