656545456565455 has 16 divisors (see below), whose sum is σ = 789211953077184. Its totient is φ = 524331658045440.

The previous prime is 656545456565441. The next prime is 656545456565477. The reversal of 656545456565455 is 554565654545656.

It is a happy number.

It is not a de Polignac number, because 656545456565455 - 2⁵ = 656545456565423 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8537647 + ... + 37228783.

It is an arithmetic number, because the mean of its divisors is an integer number (49325747067324).

Almost surely, 2^{656545456565455} is an apocalyptic number.

656545456565455 is a deficient number, since it is larger than the sum of its proper divisors (132666496511729).

656545456565455 is a wasteful number, since it uses less digits than its factorization.

656545456565455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28699026.

The product of its digits is 32400000000, while the sum is 76.

The spelling of 656545456565455 in words is "six hundred fifty-six trillion, five hundred forty-five billion, four hundred fifty-six million, five hundred sixty-five thousand, four hundred fifty-five".