656492649201 has 40 divisors (see below), whose sum is σ = 1007836723520. Its totient is φ = 425560316832.

The previous prime is 656492649187. The next prime is 656492649209. The reversal of 656492649201 is 102946294656.

656492649201 is a `hidden beast` number, since 6 + 5 + 6 + 492 + 64 + 92 + 0 + 1 = 666.

It is not a de Polignac number, because 656492649201 - 2⁷ = 656492649073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (656492649209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 4662900 + ... + 4801626.

It is an arithmetic number, because the mean of its divisors is an integer number (25195918088).

Almost surely, 2^656492649201 is an apocalyptic number.

It is an amenable number.

656492649201 is a deficient number, since it is larger than the sum of its proper divisors (351344074319).

656492649201 is a wasteful number, since it uses less digits than its factorization.

656492649201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140355 (or 140346 counting only the distinct ones).

The product of its (nonzero) digits is 5598720, while the sum is 54.

The spelling of 656492649201 in words is "six hundred fifty-six billion, four hundred ninety-two million, six hundred forty-nine thousand, two hundred one".