257409128802 has 32 divisors (see below), whose sum is σ = 588944633472. Its totient is φ = 73472851584.

The previous prime is 257409128791. The next prime is 257409128807. The reversal of 257409128802 is 208821904752.

It is not an unprimeable number, because it can be changed into a prime (257409128807) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2982523 + ... + 3067614.

It is an arithmetic number, because the mean of its divisors is an integer number (18404519796).

Almost surely, 2^257409128802 is an apocalyptic number.

257409128802 is an abundant number, since it is smaller than the sum of its proper divisors (331535504670).

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

257409128802 is a wasteful number, since it uses less digits than its factorization.

257409128802 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6051162.

The product of its (nonzero) digits is 645120, while the sum is 48.

The spelling of 257409128802 in words is "two hundred fifty-seven billion, four hundred nine million, one hundred twenty-eight thousand, eight hundred two".