72221578716 has 48 divisors (see below), whose sum is σ = 192785438720. Its totient is φ = 20613890880.

The previous prime is 72221578687. The next prime is 72221578739. The reversal of 72221578716 is 61787512227.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 350551 + ... + 517038.

Almost surely, 2^72221578716 is an apocalyptic number.

It is an amenable number.

72221578716 is an abundant number, since it is smaller than the sum of its proper divisors (120563860004).

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

72221578716 is a wasteful number, since it uses less digits than its factorization.

72221578716 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 868594 (or 868592 counting only the distinct ones).

The product of its digits is 658560, while the sum is 48.

The spelling of 72221578716 in words is "seventy-two billion, two hundred twenty-one million, five hundred seventy-eight thousand, seven hundred sixteen".