257251320854 has 12 divisors (see below), whose sum is σ = 424145773212. Its totient is φ = 116932418460.

The previous prime is 257251320847. The next prime is 257251320877. The reversal of 257251320854 is 458023152752.

It is a happy number.

It is a super-2 number, since 2×257251320854² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 531510752 + ... + 531511235.

It is an arithmetic number, because the mean of its divisors is an integer number (35345481101).

Almost surely, 2^257251320854 is an apocalyptic number.

257251320854 is a deficient number, since it is larger than the sum of its proper divisors (166894452358).

257251320854 is a wasteful number, since it uses less digits than its factorization.

257251320854 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1063022011 (or 1063022000 counting only the distinct ones).

The product of its (nonzero) digits is 672000, while the sum is 44.

The spelling of 257251320854 in words is "two hundred fifty-seven billion, two hundred fifty-one million, three hundred twenty thousand, eight hundred fifty-four".