68840681972 has 24 divisors (see below), whose sum is σ = 127142937600. Its totient is φ = 32523590016.

The previous prime is 68840681971. The next prime is 68840682007. The reversal of 68840681972 is 27918604886.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68840681971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1153397 + ... + 1211612.

It is an arithmetic number, because the mean of its divisors is an integer number (5297622400).

Almost surely, 2^68840681972 is an apocalyptic number.

It is an amenable number.

68840681972 is a deficient number, since it is larger than the sum of its proper divisors (58302255628).

68840681972 is a wasteful number, since it uses less digits than its factorization.

68840681972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2365415 (or 2365413 counting only the distinct ones).

The product of its (nonzero) digits is 9289728, while the sum is 59.

The spelling of 68840681972 in words is "sixty-eight billion, eight hundred forty million, six hundred eighty-one thousand, nine hundred seventy-two".