257382270656 has 112 divisors (see below), whose sum is σ = 619054871616. Its totient is φ = 103647903744.

The previous prime is 257382270647. The next prime is 257382270671. The reversal of 257382270656 is 656072283752.

It is a tau number, because it is divible by the number of its divisors (112).

It is a junction number, because it is equal to n+sod(n) for n = 257382270598 and 257382270607.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4671686 + ... + 4726458.

Almost surely, 2^257382270656 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 257382270656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (309527435808).

257382270656 is an abundant number, since it is smaller than the sum of its proper divisors (361672600960).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

257382270656 is a wasteful number, since it uses less digits than its factorization.

257382270656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55426 (or 55416 counting only the distinct ones).

The product of its (nonzero) digits is 8467200, while the sum is 53.

The spelling of 257382270656 in words is "two hundred fifty-seven billion, three hundred eighty-two million, two hundred seventy thousand, six hundred fifty-six".