68673408868 has 24 divisors (see below), whose sum is σ = 122188524920. Its totient is φ = 33762769920.

The previous prime is 68673408851. The next prime is 68673408871. The reversal of 68673408868 is 86880437686.

It can be written as a sum of positive squares in 4 ways, for example, as 25229510244 + 43443898624 = 158838^2 + 208432^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 728830 + ... + 817642.

Almost surely, 2^68673408868 is an apocalyptic number.

It is an amenable number.

68673408868 is a deficient number, since it is larger than the sum of its proper divisors (53515116052).

68673408868 is a wasteful number, since it uses less digits than its factorization.

68673408868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92047 (or 92045 counting only the distinct ones).

The product of its (nonzero) digits is 74317824, while the sum is 64.

The spelling of 68673408868 in words is "sixty-eight billion, six hundred seventy-three million, four hundred eight thousand, eight hundred sixty-eight".