72680356322 has 54 divisors (see below), whose sum is σ = 128485160739. Its totient is φ = 30744967680.

The previous prime is 72680356321. The next prime is 72680356363. The reversal of 72680356322 is 22365308627.

It can be written as a sum of positive squares in 5 ways, for example, as 10882871041 + 61797485281 = 104321^2 + 248591^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=190631.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72680356321) by changing a digit.

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 26 ways as a sum of consecutive naturals, for example, 301578122 + ... + 301578362.

Almost surely, 2^72680356322 is an apocalyptic number.

72680356322 is a deficient number, since it is larger than the sum of its proper divisors (55804804417).

72680356322 is an equidigital number, since it uses as much as digits as its factorization.

72680356322 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 724 (or 363 counting only the distinct ones).

The product of its (nonzero) digits is 725760, while the sum is 44.

The spelling of 72680356322 in words is "seventy-two billion, six hundred eighty million, three hundred fifty-six thousand, three hundred twenty-two".