656188040331 has 32 divisors (see below), whose sum is σ = 1067786304000. Its totient is φ = 396415651104.

The previous prime is 656188040297. The next prime is 656188040341. The reversal of 656188040331 is 133040881656.

656188040331 is a `hidden beast` number, since 6 + 561 + 8 + 80 + 4 + 0 + 3 + 3 + 1 = 666.

It is not a de Polignac number, because 656188040331 - 2¹⁰ = 656188039307 is a prime.

It is a super-2 number, since 2×656188040331² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (656188040341) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 27795136 + ... + 27818733.

It is an arithmetic number, because the mean of its divisors is an integer number (33368322000).

Almost surely, 2^656188040331 is an apocalyptic number.

656188040331 is a deficient number, since it is larger than the sum of its proper divisors (411598263669).

656188040331 is a wasteful number, since it uses less digits than its factorization.

656188040331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55613920 (or 55613914 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 45.

The spelling of 656188040331 in words is "six hundred fifty-six billion, one hundred eighty-eight million, forty thousand, three hundred thirty-one".