68832769840 has 80 divisors (see below), whose sum is σ = 170489088000. Its totient is φ = 25769684736.

The previous prime is 68832769807. The next prime is 68832769877. The reversal of 68832769840 is 4896723886.

It is a tau number, because it is divible by the number of its divisors (80).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 146640 + ... + 398959.

It is an arithmetic number, because the mean of its divisors is an integer number (2131113600).

Almost surely, 2^68832769840 is an apocalyptic number.

It is an amenable number.

68832769840 is an abundant number, since it is smaller than the sum of its proper divisors (101656318160).

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

68832769840 is a wasteful number, since it uses less digits than its factorization.

68832769840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 545714 (or 545708 counting only the distinct ones).

The product of its (nonzero) digits is 27869184, while the sum is 61.

The spelling of 68832769840 in words is "sixty-eight billion, eight hundred thirty-two million, seven hundred sixty-nine thousand, eight hundred forty".