72815511316799 has 4 divisors (see below), whose sum is σ = 72818666121360. Its totient is φ = 72812356512240.

The previous prime is 72815511316729. The next prime is 72815511316853. The reversal of 72815511316799 is 99761311551827.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72815511316799 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72815511316729) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1577367659 + ... + 1577413820.

It is an arithmetic number, because the mean of its divisors is an integer number (18204666530340).

Almost surely, 2^{72815511316799} is an apocalyptic number.

72815511316799 is a deficient number, since it is larger than the sum of its proper divisors (3154804561).

72815511316799 is a wasteful number, since it uses less digits than its factorization.

72815511316799 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3154804560.

The product of its digits is 28576800, while the sum is 65.

The spelling of 72815511316799 in words is "seventy-two trillion, eight hundred fifteen billion, five hundred eleven million, three hundred sixteen thousand, seven hundred ninety-nine".