72964476509 has 2 divisors, whose sum is σ = 72964476510. Its totient is φ = 72964476508.

The previous prime is 72964476467. The next prime is 72964476553. The reversal of 72964476509 is 90567446927.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 57717660025 + 15246816484 = 240245^2 + 123478^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72964476509 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72964476569) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36482238254 + 36482238255.

It is an arithmetic number, because the mean of its divisors is an integer number (36482238255).

Almost surely, 2^72964476509 is an apocalyptic number.

It is an amenable number.

72964476509 is a deficient number, since it is larger than the sum of its proper divisors (1).

72964476509 is an equidigital number, since it uses as much as digits as its factorization.

72964476509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 22861440, while the sum is 59.

The spelling of 72964476509 in words is "seventy-two billion, nine hundred sixty-four million, four hundred seventy-six thousand, five hundred nine".