68688371844 has 48 divisors (see below), whose sum is σ = 178389758400. Its totient is φ = 22856421888.

The previous prime is 68688371833. The next prime is 68688371867. The reversal of 68688371844 is 44817388686.

68688371844 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×68688371844² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 488814 + ... + 613445.

It is an arithmetic number, because the mean of its divisors is an integer number (3716453300).

Almost surely, 2^68688371844 is an apocalyptic number.

It is an amenable number.

68688371844 is an abundant number, since it is smaller than the sum of its proper divisors (109701386556).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

68688371844 is a wasteful number, since it uses less digits than its factorization.

68688371844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1102849 (or 1102841 counting only the distinct ones).

The product of its digits is 49545216, while the sum is 63.

The spelling of 68688371844 in words is "sixty-eight billion, six hundred eighty-eight million, three hundred seventy-one thousand, eight hundred forty-four".