72445056322 has 4 divisors (see below), whose sum is σ = 108667584486. Its totient is φ = 36222528160.

The previous prime is 72445056287. The next prime is 72445056329. The reversal of 72445056322 is 22365054427.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 38146386721 + 34298669601 = 195311^2 + 185199^2 .

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (72445056329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18111264079 + ... + 18111264082.

Almost surely, 2^72445056322 is an apocalyptic number.

72445056322 is a deficient number, since it is larger than the sum of its proper divisors (36222528164).

72445056322 is a wasteful number, since it uses less digits than its factorization.

72445056322 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36222528163.

The product of its (nonzero) digits is 403200, while the sum is 40.

The spelling of 72445056322 in words is "seventy-two billion, four hundred forty-five million, fifty-six thousand, three hundred twenty-two".