591387216268 has 54 divisors (see below), whose sum is σ = 1068048169188. Its totient is φ = 286369035120.

The previous prime is 591387216149. The next prime is 591387216269. The reversal of 591387216268 is 862612783195.

It is not an unprimeable number, because it can be changed into a prime (591387216269) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 1926342571 + ... + 1926342877.

Almost surely, 2^591387216268 is an apocalyptic number.

It is an amenable number.

591387216268 is a deficient number, since it is larger than the sum of its proper divisors (476660952920).

591387216268 is an equidigital number, since it uses as much as digits as its factorization.

591387216268 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1043 (or 543 counting only the distinct ones).

The product of its digits is 8709120, while the sum is 58.

The spelling of 591387216268 in words is "five hundred ninety-one billion, three hundred eighty-seven million, two hundred sixteen thousand, two hundred sixty-eight".