257309127273 has 24 divisors (see below), whose sum is σ = 378435854944. Its totient is φ = 155393821440.

The previous prime is 257309127227. The next prime is 257309127277. The reversal of 257309127273 is 372721903752.

It is not a de Polignac number, because 257309127273 - 2¹² = 257309123177 is a prime.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (257309127277) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1149640 + ... + 1355097.

Almost surely, 2^257309127273 is an apocalyptic number.

It is an amenable number.

257309127273 is a deficient number, since it is larger than the sum of its proper divisors (121126727671).

257309127273 is a wasteful number, since it uses less digits than its factorization.

257309127273 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2505045 (or 2505034 counting only the distinct ones).

The product of its (nonzero) digits is 1111320, while the sum is 48.

The spelling of 257309127273 in words is "two hundred fifty-seven billion, three hundred nine million, one hundred twenty-seven thousand, two hundred seventy-three".