72816511 has 2 divisors, whose sum is σ = 72816512. Its totient is φ = 72816510.

The previous prime is 72816479. The next prime is 72816517. The reversal of 72816511 is 11561827.

It is a strong prime.

It is an emirp because it is prime and its reverse (11561827) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 72816511 - 2⁵ = 72816479 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72816517) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36408255 + 36408256.

It is an arithmetic number, because the mean of its divisors is an integer number (36408256).

Almost surely, 2^72816511 is an apocalyptic number.

72816511 is a deficient number, since it is larger than the sum of its proper divisors (1).

72816511 is an equidigital number, since it uses as much as digits as its factorization.

72816511 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3360, while the sum is 31.

The square root of 72816511 is about 8533.2591077501. The cubic root of 72816511 is about 417.5834601934.

The spelling of 72816511 in words is "seventy-two million, eight hundred sixteen thousand, five hundred eleven".