257375212813747 has 4 divisors (see below), whose sum is σ = 294143100358576. Its totient is φ = 220607325268920.

The previous prime is 257375212813717. The next prime is 257375212813759. The reversal of 257375212813747 is 747318212573752.

257375212813747 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-257375212813747 is a prime.

It is not an unprimeable number, because it can be changed into a prime (257375212813717) 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, 18383943772404 + ... + 18383943772417.

It is an arithmetic number, because the mean of its divisors is an integer number (73535775089644).

Almost surely, 2^{257375212813747} is an apocalyptic number.

257375212813747 is a deficient number, since it is larger than the sum of its proper divisors (36767887544829).

257375212813747 is an equidigital number, since it uses as much as digits as its factorization.

257375212813747 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36767887544828.

The product of its digits is 138297600, while the sum is 64.

The spelling of 257375212813747 in words is "two hundred fifty-seven trillion, three hundred seventy-five billion, two hundred twelve million, eight hundred thirteen thousand, seven hundred forty-seven".