72656015 has 4 divisors (see below), whose sum is σ = 87187224. Its totient is φ = 58124808.

The previous prime is 72656009. The next prime is 72656027. The reversal of 72656015 is 51065627.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 51065627 = 3779 ⋅13513.

It is a cyclic number.

It is not a de Polignac number, because 72656015 - 2²² = 68461711 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7265597 + ... + 7265606.

It is an arithmetic number, because the mean of its divisors is an integer number (21796806).

Almost surely, 2^72656015 is an apocalyptic number.

72656015 is a deficient number, since it is larger than the sum of its proper divisors (14531209).

72656015 is a wasteful number, since it uses less digits than its factorization.

72656015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14531208.

The product of its (nonzero) digits is 12600, while the sum is 32.

The square root of 72656015 is about 8523.8497757762. The cubic root of 72656015 is about 417.2764337842.

The spelling of 72656015 in words is "seventy-two million, six hundred fifty-six thousand, fifteen".