656212441213 has 24 divisors (see below), whose sum is σ = 782138185920. Its totient is φ = 548629260480.

The previous prime is 656212441211. The next prime is 656212441219. The reversal of 656212441213 is 312144212656.

It is not a de Polignac number, because 656212441213 - 2¹ = 656212441211 is a prime.

It is a super-2 number, since 2×656212441213² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (656212441211) 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, 9849070 + ... + 9915472.

It is an arithmetic number, because the mean of its divisors is an integer number (32589091080).

Almost surely, 2^656212441213 is an apocalyptic number.

It is an amenable number.

656212441213 is a deficient number, since it is larger than the sum of its proper divisors (125925744707).

656212441213 is a wasteful number, since it uses less digits than its factorization.

656212441213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71377 (or 71370 counting only the distinct ones).

The product of its digits is 69120, while the sum is 37.

Adding to 656212441213 its reverse (312144212656), we get a palindrome (968356653869).

The spelling of 656212441213 in words is "six hundred fifty-six billion, two hundred twelve million, four hundred forty-one thousand, two hundred thirteen".