64656504163255 has 4 divisors (see below), whose sum is σ = 77587804995912. Its totient is φ = 51725203330600.

The previous prime is 64656504163217. The next prime is 64656504163271. The reversal of 64656504163255 is 55236140565646.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 64656504163255 - 2¹³ = 64656504155063 is a prime.

It is a super-2 number, since 2×64656504163255² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 64656504163255.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6465650416321 + ... + 6465650416330.

It is an arithmetic number, because the mean of its divisors is an integer number (19396951248978).

Almost surely, 2^{64656504163255} is an apocalyptic number.

64656504163255 is a deficient number, since it is larger than the sum of its proper divisors (12931300832657).

64656504163255 is a wasteful number, since it uses less digits than its factorization.

64656504163255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12931300832656.

The product of its (nonzero) digits is 77760000, while the sum is 58.

The spelling of 64656504163255 in words is "sixty-four trillion, six hundred fifty-six billion, five hundred four million, one hundred sixty-three thousand, two hundred fifty-five".