72466326565 has 24 divisors (see below), whose sum is σ = 88763725800. Its totient is φ = 56792047104.

The previous prime is 72466326509. The next prime is 72466326631. The reversal of 72466326565 is 56562366427.

It can be written as a sum of positive squares in 12 ways, for example, as 50005009924 + 22461316641 = 223618^2 + 149871^2 .

It is not a de Polignac number, because 72466326565 - 2¹¹ = 72466324517 is a prime.

It is a congruent number.

It is an unprimeable number.

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 in 23 ways as a sum of consecutive naturals, for example, 3960979 + ... + 3979231.

It is an arithmetic number, because the mean of its divisors is an integer number (3698488575).

Almost surely, 2^72466326565 is an apocalyptic number.

It is an amenable number.

72466326565 is a deficient number, since it is larger than the sum of its proper divisors (16297399235).

72466326565 is a wasteful number, since it uses less digits than its factorization.

72466326565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18553 (or 18480 counting only the distinct ones).

The product of its digits is 10886400, while the sum is 52.

The spelling of 72466326565 in words is "seventy-two billion, four hundred sixty-six million, three hundred twenty-six thousand, five hundred sixty-five".