72216887824 has 75 divisors (see below), whose sum is σ = 147441089487. Its totient is φ = 34266554784.

The previous prime is 72216887803. The next prime is 72216887857. The reversal of 72216887824 is 42878861227.

The square root of 72216887824 is 268732.

It is a perfect power (a square), and thus also a powerful number.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 568636849 + ... + 568636975.

Almost surely, 2^72216887824 is an apocalyptic number.

72216887824 is the 268732-nd square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 72216887824

72216887824 is an abundant number, since it is smaller than the sum of its proper divisors (75224201663).

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

72216887824 is an frugal number, since it uses more digits than its factorization.

72216887824 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 354 (or 152 counting only the distinct ones).

The product of its digits is 4816896, while the sum is 55.

The spelling of 72216887824 in words is "seventy-two billion, two hundred sixteen million, eight hundred eighty-seven thousand, eight hundred twenty-four".