72516865 has 8 divisors (see below), whose sum is σ = 88122240. Its totient is φ = 57278832.

The previous prime is 72516853. The next prime is 72516931. The reversal of 72516865 is 56861527.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 72516865 - 2⁵ = 72516833 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 91399 + ... + 92188.

It is an arithmetic number, because the mean of its divisors is an integer number (11015280).

Almost surely, 2^72516865 is an apocalyptic number.

It is an amenable number.

72516865 is a deficient number, since it is larger than the sum of its proper divisors (15605375).

72516865 is a wasteful number, since it uses less digits than its factorization.

72516865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 183671.

The product of its digits is 100800, while the sum is 40.

The square root of 72516865 is about 8515.6834722763. The cubic root of 72516865 is about 417.0098757981.

The spelling of 72516865 in words is "seventy-two million, five hundred sixteen thousand, eight hundred sixty-five".