256507724562215 has 16 divisors (see below), whose sum is σ = 353331722806272. Its totient is φ = 175116160853664.

The previous prime is 256507724562211. The next prime is 256507724562217. The reversal of 256507724562215 is 512265427705652.

It is a cyclic number.

It is not a de Polignac number, because 256507724562215 - 2² = 256507724562211 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256507724562211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16142705999 + ... + 16142721888.

It is an arithmetic number, because the mean of its divisors is an integer number (22083232675392).

Almost surely, 2^{256507724562215} is an apocalyptic number.

256507724562215 is a deficient number, since it is larger than the sum of its proper divisors (96823998244057).

256507724562215 is a wasteful number, since it uses less digits than its factorization.

256507724562215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32285428126.

The product of its (nonzero) digits is 70560000, while the sum is 59.

The spelling of 256507724562215 in words is "two hundred fifty-six trillion, five hundred seven billion, seven hundred twenty-four million, five hundred sixty-two thousand, two hundred fifteen".