656212616431 has 8 divisors (see below), whose sum is σ = 694839628080. Its totient is φ = 617588523648.

The previous prime is 656212616419. The next prime is 656212616473. The reversal of 656212616431 is 134616212656.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 656212616431 - 2¹¹ = 656212614383 is a prime.

It is a super-2 number, since 2×656212616431² (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 (656212616491) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 258136 + ... + 1174333.

It is an arithmetic number, because the mean of its divisors is an integer number (86854953510).

Almost surely, 2^656212616431 is an apocalyptic number.

656212616431 is a deficient number, since it is larger than the sum of its proper divisors (38627011649).

656212616431 is a wasteful number, since it uses less digits than its factorization.

656212616431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1459433.

The product of its digits is 311040, while the sum is 43.

The spelling of 656212616431 in words is "six hundred fifty-six billion, two hundred twelve million, six hundred sixteen thousand, four hundred thirty-one".