257494325979 has 16 divisors (see below), whose sum is σ = 374628904704. Its totient is φ = 156018957600.

The previous prime is 257494325953. The next prime is 257494325983. The reversal of 257494325979 is 979523494752.

It is a happy number.

It is not a de Polignac number, because 257494325979 - 2²⁰ = 257493277403 is a prime.

It is a super-2 number, since 2×257494325979² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (257494325929) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 818127 + ... + 1088264.

It is an arithmetic number, because the mean of its divisors is an integer number (23414306544).

Almost surely, 2^257494325979 is an apocalyptic number.

257494325979 is a deficient number, since it is larger than the sum of its proper divisors (117134578725).

257494325979 is a wasteful number, since it uses less digits than its factorization.

257494325979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1910498.

The product of its digits is 171460800, while the sum is 66.

The spelling of 257494325979 in words is "two hundred fifty-seven billion, four hundred ninety-four million, three hundred twenty-five thousand, nine hundred seventy-nine".