656042235431 has 16 divisors (see below), whose sum is σ = 720868962048. Its totient is φ = 592092633600.

The previous prime is 656042235403. The next prime is 656042235451. The reversal of 656042235431 is 134532240656.

656042235431 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 656042235431 - 2¹⁴ = 656042219047 is a prime.

It is a super-2 number, since 2×656042235431² (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 (656042235451) 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, 716636 + ... + 1351166.

It is an arithmetic number, because the mean of its divisors is an integer number (45054310128).

Almost surely, 2^656042235431 is an apocalyptic number.

656042235431 is a deficient number, since it is larger than the sum of its proper divisors (64826726617).

656042235431 is a wasteful number, since it uses less digits than its factorization.

656042235431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 635222.

The product of its (nonzero) digits is 518400, while the sum is 41.

The spelling of 656042235431 in words is "six hundred fifty-six billion, forty-two million, two hundred thirty-five thousand, four hundred thirty-one".