72263436320 has 24 divisors (see below), whose sum is σ = 170722368684. Its totient is φ = 28905374464.

The previous prime is 72263436319. The next prime is 72263436353. The reversal of 72263436320 is 2363436227.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 70091503504 + 2171932816 = 264748^2 + 46604^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 225823079 + ... + 225823398.

Almost surely, 2^72263436320 is an apocalyptic number.

It is an amenable number.

72263436320 is an abundant number, since it is smaller than the sum of its proper divisors (98458932364).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

72263436320 is a wasteful number, since it uses less digits than its factorization.

72263436320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 451646492 (or 451646484 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 38.

The spelling of 72263436320 in words is "seventy-two billion, two hundred sixty-three million, four hundred thirty-six thousand, three hundred twenty".