257918277338 has 4 divisors (see below), whose sum is σ = 386877416010. Its totient is φ = 128959138668.

The previous prime is 257918277319. The next prime is 257918277347. The reversal of 257918277338 is 833772819752.

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

It can be written as a sum of positive squares in only one way, i.e., 252649985449 + 5268291889 = 502643^2 + 72583^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64479569333 + ... + 64479569336.

Almost surely, 2^257918277338 is an apocalyptic number.

257918277338 is a deficient number, since it is larger than the sum of its proper divisors (128959138672).

257918277338 is a wasteful number, since it uses less digits than its factorization.

257918277338 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128959138671.

The product of its digits is 35562240, while the sum is 62.

The spelling of 257918277338 in words is "two hundred fifty-seven billion, nine hundred eighteen million, two hundred seventy-seven thousand, three hundred thirty-eight".