257238857880 has 96 divisors (see below), whose sum is σ = 836566436160. Its totient is φ = 68552709120.

The previous prime is 257238857851. The next prime is 257238857893. The reversal of 257238857880 is 88758832752.

257238857880 is a `hidden beast` number, since 2 + 57 + 2 + 3 + 8 + 8 + 578 + 8 + 0 = 666.

257238857880 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 329025 + ... + 789135.

It is an arithmetic number, because the mean of its divisors is an integer number (8714233710).

Almost surely, 2^257238857880 is an apocalyptic number.

257238857880 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

257238857880 is an abundant number, since it is smaller than the sum of its proper divisors (579327578280).

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

257238857880 is a wasteful number, since it uses less digits than its factorization.

257238857880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 461681 (or 461674 counting only the distinct ones).

The product of its (nonzero) digits is 60211200, while the sum is 63.

The spelling of 257238857880 in words is "two hundred fifty-seven billion, two hundred thirty-eight million, eight hundred fifty-seven thousand, eight hundred eighty".