257863780794 has 16 divisors (see below), whose sum is σ = 518345470368. Its totient is φ = 85518275472.

The previous prime is 257863780753. The next prime is 257863780843. The reversal of 257863780794 is 497087368752.

It is a happy number.

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 in 7 ways as a sum of consecutive naturals, for example, 109078252 + ... + 109080615.

It is an arithmetic number, because the mean of its divisors is an integer number (32396591898).

Almost surely, 2^257863780794 is an apocalyptic number.

257863780794 is an abundant number, since it is smaller than the sum of its proper divisors (260481689574).

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

257863780794 is a wasteful number, since it uses less digits than its factorization.

257863780794 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 218159069.

The product of its (nonzero) digits is 142248960, while the sum is 66.

The spelling of 257863780794 in words is "two hundred fifty-seven billion, eight hundred sixty-three million, seven hundred eighty thousand, seven hundred ninety-four".