257033677779 has 24 divisors (see below), whose sum is σ = 373118700864. Its totient is φ = 170503326000.

The previous prime is 257033677759. The next prime is 257033677787. The reversal of 257033677779 is 977776330752.

It is a happy number.

It is not a de Polignac number, because 257033677779 - 2²¹ = 257031580627 is a prime.

It is not an unprimeable number, because it can be changed into a prime (257033677709) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9502384 + ... + 9529394.

It is an arithmetic number, because the mean of its divisors is an integer number (15546612536).

Almost surely, 2^257033677779 is an apocalyptic number.

257033677779 is a deficient number, since it is larger than the sum of its proper divisors (116085023085).

257033677779 is a wasteful number, since it uses less digits than its factorization.

257033677779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32239 (or 32236 counting only the distinct ones).

The product of its (nonzero) digits is 81682020, while the sum is 63.

The spelling of 257033677779 in words is "two hundred fifty-seven billion, thirty-three million, six hundred seventy-seven thousand, seven hundred seventy-nine".