72564255615 has 32 divisors (see below), whose sum is σ = 116479973376. Its totient is φ = 38575405440.

The previous prime is 72564255611. The next prime is 72564255629. The reversal of 72564255615 is 51655246527.

It is not a de Polignac number, because 72564255615 - 2² = 72564255611 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72564255611) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6936729 + ... + 6947181.

It is an arithmetic number, because the mean of its divisors is an integer number (3639999168).

Almost surely, 2^72564255615 is an apocalyptic number.

72564255615 is a deficient number, since it is larger than the sum of its proper divisors (43915717761).

72564255615 is a wasteful number, since it uses less digits than its factorization.

72564255615 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11919.

The product of its digits is 2520000, while the sum is 48.

The spelling of 72564255615 in words is "seventy-two billion, five hundred sixty-four million, two hundred fifty-five thousand, six hundred fifteen".