72626924921 has 2 divisors, whose sum is σ = 72626924922. Its totient is φ = 72626924920.

The previous prime is 72626924893. The next prime is 72626924983. The reversal of 72626924921 is 12942962627.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 70736849296 + 1890075625 = 265964^2 + 43475^2 .

It is a cyclic number.

It is not a de Polignac number, because 72626924921 - 2¹⁸ = 72626662777 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 72626924921.

It is not a weakly prime, because it can be changed into another prime (72626926921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36313462460 + 36313462461.

It is an arithmetic number, because the mean of its divisors is an integer number (36313462461).

Almost surely, 2^72626924921 is an apocalyptic number.

It is an amenable number.

72626924921 is a deficient number, since it is larger than the sum of its proper divisors (1).

72626924921 is an equidigital number, since it uses as much as digits as its factorization.

72626924921 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1306368, while the sum is 50.

The spelling of 72626924921 in words is "seventy-two billion, six hundred twenty-six million, nine hundred twenty-four thousand, nine hundred twenty-one".