256918052765 has 8 divisors (see below), whose sum is σ = 336329087328. Its totient is φ = 186849492880.

The previous prime is 256918052747. The next prime is 256918052827. The reversal of 256918052765 is 567250819652.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 256918052765 - 2⁶ = 256918052701 is a prime.

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 256918052765.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2335618607 + ... + 2335618716.

It is an arithmetic number, because the mean of its divisors is an integer number (42041135916).

Almost surely, 2^256918052765 is an apocalyptic number.

It is an amenable number.

256918052765 is a deficient number, since it is larger than the sum of its proper divisors (79411034563).

256918052765 is a wasteful number, since it uses less digits than its factorization.

256918052765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4671237339.

The product of its (nonzero) digits is 9072000, while the sum is 56.

The spelling of 256918052765 in words is "two hundred fifty-six billion, nine hundred eighteen million, fifty-two thousand, seven hundred sixty-five".