257723229458 has 6 divisors (see below), whose sum is σ = 386585921109. Its totient is φ = 128861255756.

The previous prime is 257723229433. The next prime is 257723229503. The reversal of 257723229458 is 854922327752.

It can be written as a sum of positive squares in 2 ways, for example, as 160389837169 + 97333392289 = 400487^2 + 311983^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=358973.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 538460 + ... + 897432.

Almost surely, 2^257723229458 is an apocalyptic number.

257723229458 is a deficient number, since it is larger than the sum of its proper divisors (128862691651).

257723229458 is an frugal number, since it uses more digits than its factorization.

257723229458 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 717948 (or 358975 counting only the distinct ones).

The product of its digits is 16934400, while the sum is 56.

The spelling of 257723229458 in words is "two hundred fifty-seven billion, seven hundred twenty-three million, two hundred twenty-nine thousand, four hundred fifty-eight".