257492281827 has 12 divisors (see below), whose sum is σ = 377371609160. Its totient is φ = 156055928160.

The previous prime is 257492281811. The next prime is 257492281831. The reversal of 257492281827 is 728182294752.

It is a happy number.

It is not a de Polignac number, because 257492281827 - 2⁴ = 257492281811 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (257492281877) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 354672202 + ... + 354672927.

Almost surely, 2^257492281827 is an apocalyptic number.

257492281827 is a deficient number, since it is larger than the sum of its proper divisors (119879327333).

257492281827 is a wasteful number, since it uses less digits than its factorization.

257492281827 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 709345154 (or 709345143 counting only the distinct ones).

The product of its digits is 9031680, while the sum is 57.

The spelling of 257492281827 in words is "two hundred fifty-seven billion, four hundred ninety-two million, two hundred eighty-one thousand, eight hundred twenty-seven".