72466326509 has 2 divisors, whose sum is σ = 72466326510. Its totient is φ = 72466326508.

The previous prime is 72466326463. The next prime is 72466326631. The reversal of 72466326509 is 90562366427.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 40997340484 + 31468986025 = 202478^2 + 177395^2 .

It is a cyclic number.

It is not a de Polignac number, because 72466326509 - 2²⁰ = 72465277933 is a prime.

It is a super-2 number, since 2×72466326509² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72466326109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36233163254 + 36233163255.

It is an arithmetic number, because the mean of its divisors is an integer number (36233163255).

Almost surely, 2^72466326509 is an apocalyptic number.

It is an amenable number.

72466326509 is a deficient number, since it is larger than the sum of its proper divisors (1).

72466326509 is an equidigital number, since it uses as much as digits as its factorization.

72466326509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3265920, while the sum is 50.

The spelling of 72466326509 in words is "seventy-two billion, four hundred sixty-six million, three hundred twenty-six thousand, five hundred nine".