72489850322 has 18 divisors (see below), whose sum is σ = 110581966287. Its totient is φ = 35639323200.

The previous prime is 72489850313. The next prime is 72489850343. The reversal of 72489850322 is 22305898427.

It is a happy number.

It can be written as a sum of positive squares in 5 ways, for example, as 21688747441 + 50801102881 = 147271^2 + 225391^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=190381.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 23224922 + ... + 23228042.

Almost surely, 2^72489850322 is an apocalyptic number.

72489850322 is a deficient number, since it is larger than the sum of its proper divisors (38092115965).

72489850322 is an frugal number, since it uses more digits than its factorization.

72489850322 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6366 (or 3184 counting only the distinct ones).

The product of its (nonzero) digits is 1935360, while the sum is 50.

Multiplying 72489850322 by its sum of digits (50), we get a square (3624492516100 = 1903810²).

The spelling of 72489850322 in words is "seventy-two billion, four hundred eighty-nine million, eight hundred fifty thousand, three hundred twenty-two".