256364371585 has 8 divisors (see below), whose sum is σ = 351585423936. Its totient is φ = 175792711920.

The previous prime is 256364371577. The next prime is 256364371639. The reversal of 256364371585 is 585173463652.

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

It is not a de Polignac number, because 256364371585 - 2³ = 256364371577 is a prime.

It is a Duffinian 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, 3662348131 + ... + 3662348200.

It is an arithmetic number, because the mean of its divisors is an integer number (43948177992).

Almost surely, 2^256364371585 is an apocalyptic number.

It is an amenable number.

256364371585 is a deficient number, since it is larger than the sum of its proper divisors (95221052351).

256364371585 is an equidigital number, since it uses as much as digits as its factorization.

256364371585 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7324696343.

The product of its digits is 18144000, while the sum is 55.

The spelling of 256364371585 in words is "two hundred fifty-six billion, three hundred sixty-four million, three hundred seventy-one thousand, five hundred eighty-five".