257689612941 has 4 divisors (see below), whose sum is σ = 343586150592. Its totient is φ = 171793075292.

The previous prime is 257689612937. The next prime is 257689612979. The reversal of 257689612941 is 149216986752.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 257689612941 - 2² = 257689612937 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (257689612441) 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, 42948268821 + ... + 42948268826.

It is an arithmetic number, because the mean of its divisors is an integer number (85896537648).

Almost surely, 2^257689612941 is an apocalyptic number.

It is an amenable number.

257689612941 is a deficient number, since it is larger than the sum of its proper divisors (85896537651).

257689612941 is an equidigital number, since it uses as much as digits as its factorization.

257689612941 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85896537650.

The product of its digits is 13063680, while the sum is 60.

The spelling of 257689612941 in words is "two hundred fifty-seven billion, six hundred eighty-nine million, six hundred twelve thousand, nine hundred forty-one".