68820139732 has 24 divisors (see below), whose sum is σ = 123553654560. Its totient is φ = 33529640160.

The previous prime is 68820139709. The next prime is 68820139807. The reversal of 68820139732 is 23793102886.

It is a congruent number.

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, 1291882 + ... + 1344097.

It is an arithmetic number, because the mean of its divisors is an integer number (5148068940).

Almost surely, 2^68820139732 is an apocalyptic number.

It is an amenable number.

68820139732 is a deficient number, since it is larger than the sum of its proper divisors (54733514828).

68820139732 is a wasteful number, since it uses less digits than its factorization.

68820139732 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2636151 (or 2636149 counting only the distinct ones).

The product of its (nonzero) digits is 870912, while the sum is 49.

The spelling of 68820139732 in words is "sixty-eight billion, eight hundred twenty million, one hundred thirty-nine thousand, seven hundred thirty-two".