257439802492 has 24 divisors (see below), whose sum is σ = 462524044752. Its totient is φ = 125327155200.

The previous prime is 257439802469. The next prime is 257439802507. The reversal of 257439802492 is 294208934752.

It is a hoax number, since the sum of its digits (55) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4607109 + ... + 4662652.

It is an arithmetic number, because the mean of its divisors is an integer number (19271835198).

Almost surely, 2^257439802492 is an apocalyptic number.

It is an amenable number.

257439802492 is a deficient number, since it is larger than the sum of its proper divisors (205084242260).

257439802492 is a wasteful number, since it uses less digits than its factorization.

257439802492 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9269949 (or 9269947 counting only the distinct ones).

The product of its (nonzero) digits is 8709120, while the sum is 55.

The spelling of 257439802492 in words is "two hundred fifty-seven billion, four hundred thirty-nine million, eight hundred two thousand, four hundred ninety-two".