72221443606 has 16 divisors (see below), whose sum is σ = 117438033888. Its totient is φ = 33112224000.

The previous prime is 72221443579. The next prime is 72221443639. The reversal of 72221443606 is 60634412227.

It is a congruent number.

It is an unprimeable number.

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, 9193915 + ... + 9201766.

It is an arithmetic number, because the mean of its divisors is an integer number (7339877118).

Almost surely, 2^72221443606 is an apocalyptic number.

72221443606 is a deficient number, since it is larger than the sum of its proper divisors (45216590282).

72221443606 is a wasteful number, since it uses less digits than its factorization.

72221443606 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18395847.

The product of its (nonzero) digits is 96768, while the sum is 37.

The spelling of 72221443606 in words is "seventy-two billion, two hundred twenty-one million, four hundred forty-three thousand, six hundred six".