257287287144 has 64 divisors (see below), whose sum is σ = 646911720000. Its totient is φ = 85271325696.

The previous prime is 257287287133. The next prime is 257287287157. The reversal of 257287287144 is 441782782752.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3002607 + ... + 3087105.

It is an arithmetic number, because the mean of its divisors is an integer number (10107995625).

Almost surely, 2^257287287144 is an apocalyptic number.

257287287144 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

257287287144 is an abundant number, since it is smaller than the sum of its proper divisors (389624432856).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

257287287144 is a wasteful number, since it uses less digits than its factorization.

257287287144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85234 (or 85230 counting only the distinct ones).

The product of its digits is 14049280, while the sum is 57.

The spelling of 257287287144 in words is "two hundred fifty-seven billion, two hundred eighty-seven million, two hundred eighty-seven thousand, one hundred forty-four".