257215087334 has 4 divisors (see below), whose sum is σ = 385822631004. Its totient is φ = 128607543666.

The previous prime is 257215087289. The next prime is 257215087357. The reversal of 257215087334 is 433780512752.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64303771832 + ... + 64303771835.

It is an arithmetic number, because the mean of its divisors is an integer number (96455657751).

Almost surely, 2^257215087334 is an apocalyptic number.

257215087334 is a deficient number, since it is larger than the sum of its proper divisors (128607543670).

257215087334 is a wasteful number, since it uses less digits than its factorization.

257215087334 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128607543669.

The product of its (nonzero) digits is 1411200, while the sum is 47.

The spelling of 257215087334 in words is "two hundred fifty-seven billion, two hundred fifteen million, eighty-seven thousand, three hundred thirty-four".