257417155023 has 24 divisors (see below), whose sum is σ = 420272910720. Its totient is φ = 139353646320.

The previous prime is 257417155007. The next prime is 257417155027. The reversal of 257417155023 is 320551714752.

It is a happy number.

It is not a de Polignac number, because 257417155023 - 2⁴ = 257417155007 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (257417155027) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 46079763 + ... + 46085348.

It is an arithmetic number, because the mean of its divisors is an integer number (17511371280).

Almost surely, 2^257417155023 is an apocalyptic number.

257417155023 is a deficient number, since it is larger than the sum of its proper divisors (162855755697).

257417155023 is a wasteful number, since it uses less digits than its factorization.

257417155023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92165147 (or 92165140 counting only the distinct ones).

The product of its (nonzero) digits is 294000, while the sum is 42.

Adding to 257417155023 its reverse (320551714752), we get a palindrome (577968869775).

The spelling of 257417155023 in words is "two hundred fifty-seven billion, four hundred seventeen million, one hundred fifty-five thousand, twenty-three".