688271860322 has 6 divisors (see below), whose sum is σ = 1032409550379. Its totient is φ = 344135343530.

The previous prime is 688271860259. The next prime is 688271860337. The reversal of 688271860322 is 223068172886.

It can be written as a sum of positive squares in only one way, i.e., 344135930161 + 344135930161 = 586631^2 + 586631^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=586631.

It is a super-2 number, since 2×688271860322² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 879947 + ... + 1466577.

Almost surely, 2^688271860322 is an apocalyptic number.

688271860322 is a deficient number, since it is larger than the sum of its proper divisors (344137690057).

688271860322 is an frugal number, since it uses more digits than its factorization.

688271860322 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1173264 (or 586633 counting only the distinct ones).

The product of its (nonzero) digits is 3096576, while the sum is 53.

The spelling of 688271860322 in words is "six hundred eighty-eight billion, two hundred seventy-one million, eight hundred sixty thousand, three hundred twenty-two".