256750226577021 has 8 divisors (see below), whose sum is σ = 342397112860800. Its totient is φ = 171135079005632.

The previous prime is 256750226577001. The next prime is 256750226577023. The reversal of 256750226577021 is 120775622057652.

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

It is a cyclic number.

It is not a de Polignac number, because 256750226577021 - 2²⁹ = 256749689706109 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256750226577023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7934659221 + ... + 7934691578.

It is an arithmetic number, because the mean of its divisors is an integer number (42799639107600).

Almost surely, 2^{256750226577021} is an apocalyptic number.

It is an amenable number.

256750226577021 is a deficient number, since it is larger than the sum of its proper divisors (85646886283779).

256750226577021 is a wasteful number, since it uses less digits than its factorization.

256750226577021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15869356195.

The product of its (nonzero) digits is 24696000, while the sum is 57.

The spelling of 256750226577021 in words is "two hundred fifty-six trillion, seven hundred fifty billion, two hundred twenty-six million, five hundred seventy-seven thousand, twenty-one".