257872862690 has 32 divisors (see below), whose sum is σ = 465441863040. Its totient is φ = 102866984064.

The previous prime is 257872862641. The next prime is 257872862743. The reversal of 257872862690 is 96268278752.

It is a super-2 number, since 2×257872862690² (a number of 24 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (62) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10492997 + ... + 10517543.

It is an arithmetic number, because the mean of its divisors is an integer number (14545058220).

Almost surely, 2^257872862690 is an apocalyptic number.

257872862690 is a deficient number, since it is larger than the sum of its proper divisors (207569000350).

257872862690 is a wasteful number, since it uses less digits than its factorization.

257872862690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27386.

The product of its (nonzero) digits is 40642560, while the sum is 62.

The spelling of 257872862690 in words is "two hundred fifty-seven billion, eight hundred seventy-two million, eight hundred sixty-two thousand, six hundred ninety".