257396665233 has 48 divisors (see below), whose sum is σ = 375006412800. Its totient is φ = 156831897600.

The previous prime is 257396665213. The next prime is 257396665247. The reversal of 257396665233 is 332566693752.

It is not a de Polignac number, because 257396665233 - 2¹⁰ = 257396664209 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is not an unprimeable number, because it can be changed into a prime (257396665213) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 50280048 + ... + 50285166.

It is an arithmetic number, because the mean of its divisors is an integer number (7812633600).

Almost surely, 2^257396665233 is an apocalyptic number.

It is an amenable number.

257396665233 is a deficient number, since it is larger than the sum of its proper divisors (117609747567).

257396665233 is a wasteful number, since it uses less digits than its factorization.

257396665233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6790 (or 6771 counting only the distinct ones).

The product of its digits is 36741600, while the sum is 57.

The spelling of 257396665233 in words is "two hundred fifty-seven billion, three hundred ninety-six million, six hundred sixty-five thousand, two hundred thirty-three".