257238541157 has 8 divisors (see below), whose sum is σ = 278268393984. Its totient is φ = 236386155888.

The previous prime is 257238541151. The next prime is 257238541159. The reversal of 257238541157 is 751145832752.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 257238541157 - 2⁶ = 257238541093 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (257238541151) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44363873 + ... + 44369670.

It is an arithmetic number, because the mean of its divisors is an integer number (34783549248).

Almost surely, 2^257238541157 is an apocalyptic number.

It is an amenable number.

257238541157 is a deficient number, since it is larger than the sum of its proper divisors (21029852827).

257238541157 is a wasteful number, since it uses less digits than its factorization.

257238541157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88733779.

The product of its digits is 2352000, while the sum is 50.

The spelling of 257238541157 in words is "two hundred fifty-seven billion, two hundred thirty-eight million, five hundred forty-one thousand, one hundred fifty-seven".