256702265175053 has 4 divisors (see below), whose sum is σ = 256702377898428. Its totient is φ = 256702152451680.

The previous prime is 256702265175017. The next prime is 256702265175143. The reversal of 256702265175053 is 350571562207652.

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

It can be written as a sum of positive squares in 2 ways, for example, as 49837415631844 + 206864849543209 = 7059562^2 + 14382797^2 .

It is a cyclic number.

It is not a de Polignac number, because 256702265175053 - 2¹² = 256702265170957 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 256702265175053.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256702265172053) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52873826 + ... + 57524307.

It is an arithmetic number, because the mean of its divisors is an integer number (64175594474607).

Almost surely, 2^{256702265175053} is an apocalyptic number.

It is an amenable number.

256702265175053 is a deficient number, since it is larger than the sum of its proper divisors (112723375).

256702265175053 is a wasteful number, since it uses less digits than its factorization.

256702265175053 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112723374.

The product of its (nonzero) digits is 26460000, while the sum is 56.

The spelling of 256702265175053 in words is "two hundred fifty-six trillion, seven hundred two billion, two hundred sixty-five million, one hundred seventy-five thousand, fifty-three".