657017257768 has 16 divisors (see below), whose sum is σ = 1296744588000. Its totient is φ = 311218700976.

The previous prime is 657017257763. The next prime is 657017257769. The reversal of 657017257768 is 867752710756.

It is not an unprimeable number, because it can be changed into a prime (657017257763) 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, 2161240828 + ... + 2161241131.

It is an arithmetic number, because the mean of its divisors is an integer number (81046536750).

Almost surely, 2^657017257768 is an apocalyptic number.

It is an amenable number.

657017257768 is a deficient number, since it is larger than the sum of its proper divisors (639727330232).

657017257768 is a wasteful number, since it uses less digits than its factorization.

657017257768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4322481984 (or 4322481980 counting only the distinct ones).

The product of its (nonzero) digits is 34574400, while the sum is 61.

The spelling of 657017257768 in words is "six hundred fifty-seven billion, seventeen million, two hundred fifty-seven thousand, seven hundred sixty-eight".