256477700754465 has 32 divisors (see below), whose sum is σ = 416580484584576. Its totient is φ = 134716947932160.

The previous prime is 256477700754433. The next prime is 256477700754493. The reversal of 256477700754465 is 564457007774652.

256477700754465 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 256477700754465 - 2⁵ = 256477700754433 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 256477700754465.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 23392702 + ... + 32560311.

It is an arithmetic number, because the mean of its divisors is an integer number (13018140143268).

Almost surely, 2^{256477700754465} is an apocalyptic number.

It is an amenable number.

256477700754465 is a deficient number, since it is larger than the sum of its proper divisors (160102783830111).

256477700754465 is a wasteful number, since it uses less digits than its factorization.

256477700754465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55957649.

The product of its (nonzero) digits is 1382976000, while the sum is 69.

The spelling of 256477700754465 in words is "two hundred fifty-six trillion, four hundred seventy-seven billion, seven hundred million, seven hundred fifty-four thousand, four hundred sixty-five".