72045615 has 16 divisors (see below), whose sum is σ = 115381728. Its totient is φ = 38388096.

The previous prime is 72045613. The next prime is 72045619. The reversal of 72045615 is 51654027.

It is not a de Polignac number, because 72045615 - 2¹ = 72045613 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72045613) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23977 + ... + 26813.

It is an arithmetic number, because the mean of its divisors is an integer number (7211358).

Almost surely, 2^72045615 is an apocalyptic number.

72045615 is a deficient number, since it is larger than the sum of its proper divisors (43336113).

72045615 is a wasteful number, since it uses less digits than its factorization.

72045615 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4538.

The product of its (nonzero) digits is 8400, while the sum is 30.

The square root of 72045615 is about 8487.9688383028. The cubic root of 72045615 is about 416.1046007152.

The spelling of 72045615 in words is "seventy-two million, forty-five thousand, six hundred fifteen".