257385322472 has 16 divisors (see below), whose sum is σ = 494368150500. Its totient is φ = 125553815680.

The previous prime is 257385322457. The next prime is 257385322483. The reversal of 257385322472 is 274223583752.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 237057976996 + 20327345476 = 486886^2 + 142574^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 257385322472.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 392355347 + ... + 392356002.

Almost surely, 2^257385322472 is an apocalyptic number.

It is an amenable number.

257385322472 is a deficient number, since it is larger than the sum of its proper divisors (236982828028).

257385322472 is a wasteful number, since it uses less digits than its factorization.

257385322472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 784711396 (or 784711392 counting only the distinct ones).

The product of its digits is 5644800, while the sum is 50.

The spelling of 257385322472 in words is "two hundred fifty-seven billion, three hundred eighty-five million, three hundred twenty-two thousand, four hundred seventy-two".