257064023715 has 16 divisors (see below), whose sum is σ = 411325993728. Its totient is φ = 137092960736.

The previous prime is 257064023659. The next prime is 257064023719. The reversal of 257064023715 is 517320460752.

It is a cyclic number.

It is not a de Polignac number, because 257064023715 - 2⁶ = 257064023651 is a prime.

It is not an unprimeable number, because it can be changed into a prime (257064023719) 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 15 ways as a sum of consecutive naturals, for example, 215109 + ... + 748598.

It is an arithmetic number, because the mean of its divisors is an integer number (25707874608).

Almost surely, 2^257064023715 is an apocalyptic number.

257064023715 is a deficient number, since it is larger than the sum of its proper divisors (154261970013).

257064023715 is a wasteful number, since it uses less digits than its factorization.

257064023715 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 981498.

The product of its (nonzero) digits is 352800, while the sum is 42.

The spelling of 257064023715 in words is "two hundred fifty-seven billion, sixty-four million, twenty-three thousand, seven hundred fifteen".