257972087808 has 66 divisors (see below), whose sum is σ = 744888831804. Its totient is φ = 85990692864.

The previous prime is 257972087803. The next prime is 257972087819. The reversal of 257972087808 is 808780279752.

It is not an unprimeable number, because it can be changed into a prime (257972087803) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 13986666 + ... + 14005097.

Almost surely, 2^257972087808 is an apocalyptic number.

It is an amenable number.

257972087808 is an abundant number, since it is smaller than the sum of its proper divisors (486916743996).

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

257972087808 is a wasteful number, since it uses less digits than its factorization.

257972087808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27991789 (or 27991768 counting only the distinct ones).

The product of its (nonzero) digits is 31610880, while the sum is 63.

The spelling of 257972087808 in words is "two hundred fifty-seven billion, nine hundred seventy-two million, eighty-seven thousand, eight hundred eight".