72019789444 has 24 divisors (see below), whose sum is σ = 126310930200. Its totient is φ = 35931033600.

The previous prime is 72019789381. The next prime is 72019789463. The reversal of 72019789444 is 44498791027.

It can be written as a sum of positive squares in 4 ways, for example, as 25488122500 + 46531666944 = 159650^2 + 215712^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3941722 + ... + 3959950.

It is an arithmetic number, because the mean of its divisors is an integer number (5262955425).

Almost surely, 2^72019789444 is an apocalyptic number.

It is an amenable number.

72019789444 is a deficient number, since it is larger than the sum of its proper divisors (54291140756).

72019789444 is a wasteful number, since it uses less digits than its factorization.

72019789444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20343 (or 20341 counting only the distinct ones).

The product of its (nonzero) digits is 4064256, while the sum is 55.

The spelling of 72019789444 in words is "seventy-two billion, nineteen million, seven hundred eighty-nine thousand, four hundred forty-four".