256724102166775 has 12 divisors (see below), whose sum is σ = 319576555514592. Its totient is φ = 204580140554240.

The previous prime is 256724102166773. The next prime is 256724102166821. The reversal of 256724102166775 is 577661201427652.

It is not a de Polignac number, because 256724102166775 - 2¹ = 256724102166773 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256724102166773) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19978522927 + ... + 19978535776.

It is an arithmetic number, because the mean of its divisors is an integer number (26631379626216).

Almost surely, 2^{256724102166775} is an apocalyptic number.

256724102166775 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

256724102166775 is a deficient number, since it is larger than the sum of its proper divisors (62852453347817).

256724102166775 is a wasteful number, since it uses less digits than its factorization.

256724102166775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39957058970 (or 39957058965 counting only the distinct ones).

The product of its (nonzero) digits is 59270400, while the sum is 61.

The spelling of 256724102166775 in words is "two hundred fifty-six trillion, seven hundred twenty-four billion, one hundred two million, one hundred sixty-six thousand, seven hundred seventy-five".