257895978983 has 4 divisors (see below), whose sum is σ = 263383127520. Its totient is φ = 252408830448.

The previous prime is 257895978971. The next prime is 257895979037. The reversal of 257895978983 is 389879598752.

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

It is a cyclic number.

It is not a de Polignac number, because 257895978983 - 2²⁸ = 257627543527 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 257895978898 and 257895978907.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (257895978943) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2743574198 + ... + 2743574291.

It is an arithmetic number, because the mean of its divisors is an integer number (65845781880).

Almost surely, 2^257895978983 is an apocalyptic number.

257895978983 is a deficient number, since it is larger than the sum of its proper divisors (5487148537).

257895978983 is an equidigital number, since it uses as much as digits as its factorization.

257895978983 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5487148536.

The product of its digits is 2743372800, while the sum is 80.

The spelling of 257895978983 in words is "two hundred fifty-seven billion, eight hundred ninety-five million, nine hundred seventy-eight thousand, nine hundred eighty-three".