257095565812 has 24 divisors (see below), whose sum is σ = 450389139200. Its totient is φ = 128413032480.

The previous prime is 257095565777. The next prime is 257095565861. The reversal of 257095565812 is 218565590752.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16742314 + ... + 16757662.

Almost surely, 2^257095565812 is an apocalyptic number.

It is an amenable number.

257095565812 is a deficient number, since it is larger than the sum of its proper divisors (193293573388).

257095565812 is a wasteful number, since it uses less digits than its factorization.

257095565812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19471 (or 19469 counting only the distinct ones).

The product of its (nonzero) digits is 7560000, while the sum is 55.

The spelling of 257095565812 in words is "two hundred fifty-seven billion, ninety-five million, five hundred sixty-five thousand, eight hundred twelve".