688193888825 has 12 divisors (see below), whose sum is σ = 853379094528. Its totient is φ = 550543064400.

The previous prime is 688193888819. The next prime is 688193888827. The reversal of 688193888825 is 528888391886.

It is not a de Polignac number, because 688193888825 - 2²⁶ = 688126779961 is a prime.

It is a super-2 number, since 2×688193888825² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (688193888827) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 969320 + ... + 1521830.

It is an arithmetic number, because the mean of its divisors is an integer number (71114924544).

Almost surely, 2^688193888825 is an apocalyptic number.

It is an amenable number.

688193888825 is a deficient number, since it is larger than the sum of its proper divisors (165185205703).

688193888825 is a wasteful number, since it uses less digits than its factorization.

688193888825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 602344 (or 602339 counting only the distinct ones).

The product of its digits is 424673280, while the sum is 74.

The spelling of 688193888825 in words is "six hundred eighty-eight billion, one hundred ninety-three million, eight hundred eighty-eight thousand, eight hundred twenty-five".