257147895085 has 16 divisors (see below), whose sum is σ = 310460967936. Its totient is φ = 204462938368.

The previous prime is 257147895077. The next prime is 257147895149. The reversal of 257147895085 is 580598741752.

It is a cyclic number.

It is not a de Polignac number, because 257147895085 - 2³ = 257147895077 is a prime.

It is a super-2 number, since 2×257147895085² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent 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, 12734517 + ... + 12754693.

It is an arithmetic number, because the mean of its divisors is an integer number (19403810496).

Almost surely, 2^257147895085 is an apocalyptic number.

It is an amenable number.

257147895085 is a deficient number, since it is larger than the sum of its proper divisors (53313072851).

257147895085 is a wasteful number, since it uses less digits than its factorization.

257147895085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35612.

The product of its (nonzero) digits is 28224000, while the sum is 61.

The spelling of 257147895085 in words is "two hundred fifty-seven billion, one hundred forty-seven million, eight hundred ninety-five thousand, eighty-five".