688961169886 has 12 divisors (see below), whose sum is σ = 1135931846616. Its totient is φ = 313164168020.

The previous prime is 688961169859. The next prime is 688961169899.

688961169886 is nontrivially palindromic in base 10.

It is a super-2 number, since 2×688961169886² (a number of 24 digits) contains 22 as substring.

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, 1423473250 + ... + 1423473733.

It is an arithmetic number, because the mean of its divisors is an integer number (94660987218).

Almost surely, 2^688961169886 is an apocalyptic number.

688961169886 is a deficient number, since it is larger than the sum of its proper divisors (446970676730).

688961169886 is a wasteful number, since it uses less digits than its factorization.

688961169886 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2846947007 (or 2846946996 counting only the distinct ones).

The product of its digits is 429981696, while the sum is 76.

The spelling of 688961169886 in words is "six hundred eighty-eight billion, nine hundred sixty-one million, one hundred sixty-nine thousand, eight hundred eighty-six".