257993215458 has 16 divisors (see below), whose sum is σ = 562894288416. Its totient is φ = 78179762240.

The previous prime is 257993215451. The next prime is 257993215477. The reversal of 257993215458 is 854512399752.

It is not an unprimeable number, because it can be changed into a prime (257993215451) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1954493991 + ... + 1954494122.

It is an arithmetic number, because the mean of its divisors is an integer number (35180893026).

Almost surely, 2^257993215458 is an apocalyptic number.

257993215458 is an abundant number, since it is smaller than the sum of its proper divisors (304901072958).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

257993215458 is a wasteful number, since it uses less digits than its factorization.

257993215458 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3908988129.

The product of its digits is 27216000, while the sum is 60.

The spelling of 257993215458 in words is "two hundred fifty-seven billion, nine hundred ninety-three million, two hundred fifteen thousand, four hundred fifty-eight".