257056117231615 has 64 divisors (see below), whose sum is σ = 340933392616320. Its totient is φ = 184896661340160.

The previous prime is 257056117231607. The next prime is 257056117231637. The reversal of 257056117231615 is 516132711650752.

It is not a de Polignac number, because 257056117231615 - 2³ = 257056117231607 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 502899091 + ... + 503409979.

It is an arithmetic number, because the mean of its divisors is an integer number (5327084259630).

Almost surely, 2^{257056117231615} is an apocalyptic number.

257056117231615 is a deficient number, since it is larger than the sum of its proper divisors (83877275384705).

257056117231615 is a wasteful number, since it uses less digits than its factorization.

257056117231615 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 512204.

The product of its (nonzero) digits is 2646000, while the sum is 52.

The spelling of 257056117231615 in words is "two hundred fifty-seven trillion, fifty-six billion, one hundred seventeen million, two hundred thirty-one thousand, six hundred fifteen".