257873945847 has 32 divisors (see below), whose sum is σ = 410071154688. Its totient is φ = 140937509856.

The previous prime is 257873945837. The next prime is 257873945921. The reversal of 257873945847 is 748549378752.

It is not a de Polignac number, because 257873945847 - 2¹⁵ = 257873913079 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (69).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (257873945837) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10460578 + ... + 10485200.

It is an arithmetic number, because the mean of its divisors is an integer number (12814723584).

Almost surely, 2^257873945847 is an apocalyptic number.

257873945847 is a deficient number, since it is larger than the sum of its proper divisors (152197208841).

257873945847 is a wasteful number, since it uses less digits than its factorization.

257873945847 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46339.

The product of its digits is 474163200, while the sum is 69.

The spelling of 257873945847 in words is "two hundred fifty-seven billion, eight hundred seventy-three million, nine hundred forty-five thousand, eight hundred forty-seven".