72664735272643 has 2 divisors, whose sum is σ = 72664735272644. Its totient is φ = 72664735272642.

The previous prime is 72664735272631. The next prime is 72664735272671. The reversal of 72664735272643 is 34627253746627.

It is a weak prime.

It is an emirp because it is prime and its reverse (34627253746627) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 72664735272643 - 2⁵ = 72664735272611 is a prime.

It is not a weakly prime, because it can be changed into another prime (72664735272673) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36332367636321 + 36332367636322.

It is an arithmetic number, because the mean of its divisors is an integer number (36332367636322).

Almost surely, 2^{72664735272643} is an apocalyptic number.

72664735272643 is a deficient number, since it is larger than the sum of its proper divisors (1).

72664735272643 is an equidigital number, since it uses as much as digits as its factorization.

72664735272643 is an evil number, because the sum of its binary digits is even.

The product of its digits is 426746880, while the sum is 64.

The spelling of 72664735272643 in words is "seventy-two trillion, six hundred sixty-four billion, seven hundred thirty-five million, two hundred seventy-two thousand, six hundred forty-three".