256316534465485 has 32 divisors (see below), whose sum is σ = 342878908176000. Its totient is φ = 182637267353856.

The previous prime is 256316534465477. The next prime is 256316534465567. The reversal of 256316534465485 is 584564435613652.

It is a cyclic number.

It is not a de Polignac number, because 256316534465485 - 2³ = 256316534465477 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 256316534465485.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 40081515 + ... + 46034344.

It is an arithmetic number, because the mean of its divisors is an integer number (10714965880500).

Almost surely, 2^{256316534465485} is an apocalyptic number.

It is an amenable number.

256316534465485 is a deficient number, since it is larger than the sum of its proper divisors (86562373710515).

256316534465485 is a wasteful number, since it uses less digits than its factorization.

256316534465485 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86117485.

The product of its digits is 1244160000, while the sum is 67.

The spelling of 256316534465485 in words is "two hundred fifty-six trillion, three hundred sixteen billion, five hundred thirty-four million, four hundred sixty-five thousand, four hundred eighty-five".