72045802418 has 6 divisors (see below), whose sum is σ = 108069273021. Its totient is φ = 36022711412.

The previous prime is 72045802417. The next prime is 72045802421. The reversal of 72045802418 is 81420854027.

It can be written as a sum of positive squares in 2 ways, for example, as 44598259489 + 27447542929 = 211183^2 + 165673^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=189797.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72045802417) 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 2 ways as a sum of consecutive naturals, for example, 284696 + ... + 474492.

Almost surely, 2^72045802418 is an apocalyptic number.

72045802418 is a deficient number, since it is larger than the sum of its proper divisors (36023470603).

72045802418 is an frugal number, since it uses more digits than its factorization.

72045802418 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 379596 (or 189799 counting only the distinct ones).

The product of its (nonzero) digits is 143360, while the sum is 41.

The spelling of 72045802418 in words is "seventy-two billion, forty-five million, eight hundred two thousand, four hundred eighteen".