257570417663 has 16 divisors (see below), whose sum is σ = 293836658976. Its totient is φ = 223667619840.

The previous prime is 257570417639. The next prime is 257570417677. The reversal of 257570417663 is 366714075752.

It is a cyclic number.

It is not a de Polignac number, because 257570417663 - 2⁸ = 257570417407 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (257570417683) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 207920 + ... + 747242.

It is an arithmetic number, because the mean of its divisors is an integer number (18364791186).

Almost surely, 2^257570417663 is an apocalyptic number.

257570417663 is a deficient number, since it is larger than the sum of its proper divisors (36266241313).

257570417663 is a wasteful number, since it uses less digits than its factorization.

257570417663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 541514.

The product of its (nonzero) digits is 7408800, while the sum is 53.

The spelling of 257570417663 in words is "two hundred fifty-seven billion, five hundred seventy million, four hundred seventeen thousand, six hundred sixty-three".