688315260725 has 6 divisors (see below), whose sum is σ = 853510923330. Its totient is φ = 550652208560.

The previous prime is 688315260707. The next prime is 688315260757. The reversal of 688315260725 is 527062513886.

It can be written as a sum of positive squares in 3 ways, for example, as 56469917956 + 631845342769 = 237634^2 + 794887^2 .

It is not a de Polignac number, because 688315260725 - 2¹⁶ = 688315195189 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 13766305190 + ... + 13766305239.

It is an arithmetic number, because the mean of its divisors is an integer number (142251820555).

Almost surely, 2^688315260725 is an apocalyptic number.

It is an amenable number.

688315260725 is a deficient number, since it is larger than the sum of its proper divisors (165195662605).

688315260725 is a wasteful number, since it uses less digits than its factorization.

688315260725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27532610439 (or 27532610434 counting only the distinct ones).

The product of its (nonzero) digits is 4838400, while the sum is 53.

The spelling of 688315260725 in words is "six hundred eighty-eight billion, three hundred fifteen million, two hundred sixty thousand, seven hundred twenty-five".