257538357087 has 32 divisors (see below), whose sum is σ = 407914272000. Its totient is φ = 142769975040.

The previous prime is 257538357077. The next prime is 257538357113. The reversal of 257538357087 is 780753835752.

It is not a de Polignac number, because 257538357087 - 2²⁸ = 257269921631 is a prime.

It is a super-2 number, since 2×257538357087² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 257538357087.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (257538357007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7063662 + ... + 7100027.

It is an arithmetic number, because the mean of its divisors is an integer number (12747321000).

Almost surely, 2^257538357087 is an apocalyptic number.

257538357087 is a deficient number, since it is larger than the sum of its proper divisors (150375914913).

257538357087 is a wasteful number, since it uses less digits than its factorization.

257538357087 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14163751.

The product of its (nonzero) digits is 49392000, while the sum is 60.

The spelling of 257538357087 in words is "two hundred fifty-seven billion, five hundred thirty-eight million, three hundred fifty-seven thousand, eighty-seven".