72689068686 has 64 divisors (see below), whose sum is σ = 159825960000. Its totient is φ = 21901102080.

The previous prime is 72689068637. The next prime is 72689068703. The reversal of 72689068686 is 68686098627.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2136940 + ... + 2170688.

It is an arithmetic number, because the mean of its divisors is an integer number (2497280625).

Almost surely, 2^72689068686 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 72689068686, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (79912980000).

72689068686 is an abundant number, since it is smaller than the sum of its proper divisors (87136891314).

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

72689068686 is a wasteful number, since it uses less digits than its factorization.

72689068686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34341.

The product of its (nonzero) digits is 83607552, while the sum is 66.

The spelling of 72689068686 in words is "seventy-two billion, six hundred eighty-nine million, sixty-eight thousand, six hundred eighty-six".