72047685889 has 9 divisors (see below), whose sum is σ = 73626122881. Its totient is φ = 70502409220.

The previous prime is 72047685887. The next prime is 72047685901. The reversal of 72047685889 is 98858674027.

The square root of 72047685889 is 268417.

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

It is not a de Polignac number, because 72047685889 - 2¹ = 72047685887 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 72047685889.

It is not an unprimeable number, because it can be changed into a prime (72047685881) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 12612744 + ... + 12618454.

Almost surely, 2^72047685889 is an apocalyptic number.

72047685889 is the 268417-th square number.

72047685889 is the 134209-th centered octagonal number.

It is an amenable number.

72047685889 is a deficient number, since it is larger than the sum of its proper divisors (1578436992).

72047685889 is an frugal number, since it uses more digits than its factorization.

72047685889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11516 (or 5758 counting only the distinct ones).

The product of its (nonzero) digits is 54190080, while the sum is 64.

Multiplying 72047685889 by its sum of digits (64), we get a square (4611051896896 = 2147336²).

The spelling of 72047685889 in words is "seventy-two billion, forty-seven million, six hundred eighty-five thousand, eight hundred eighty-nine".