72544865 has 16 divisors (see below), whose sum is σ = 92586240. Its totient is φ = 54378240.

The previous prime is 72544859. The next prime is 72544877. The reversal of 72544865 is 56844527.

It is not a de Polignac number, because 72544865 - 2²⁰ = 71496289 is a prime.

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, 18530 + ... + 22100.

It is an arithmetic number, because the mean of its divisors is an integer number (5786640).

Almost surely, 2^72544865 is an apocalyptic number.

It is an amenable number.

72544865 is a deficient number, since it is larger than the sum of its proper divisors (20041375).

72544865 is a wasteful number, since it uses less digits than its factorization.

72544865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3832.

The product of its digits is 268800, while the sum is 41.

The square root of 72544865 is about 8517.3273390190. The cubic root of 72544865 is about 417.0635404367.

The spelling of 72544865 in words is "seventy-two million, five hundred forty-four thousand, eight hundred sixty-five".