256621160315 has 32 divisors (see below), whose sum is σ = 332902785600. Its totient is φ = 188780281344.

The previous prime is 256621160309. The next prime is 256621160339. The reversal of 256621160315 is 513061126652.

It is a cyclic number.

It is not a de Polignac number, because 256621160315 - 2¹² = 256621156219 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 59004761 + ... + 59009109.

It is an arithmetic number, because the mean of its divisors is an integer number (10403212050).

Almost surely, 2^256621160315 is an apocalyptic number.

256621160315 is a deficient number, since it is larger than the sum of its proper divisors (76281625285).

256621160315 is a wasteful number, since it uses less digits than its factorization.

256621160315 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7631.

The product of its (nonzero) digits is 64800, while the sum is 38.

Adding to 256621160315 its reverse (513061126652), we get a palindrome (769682286967).

The spelling of 256621160315 in words is "two hundred fifty-six billion, six hundred twenty-one million, one hundred sixty thousand, three hundred fifteen".