72019789445 has 8 divisors (see below), whose sum is σ = 86428793880. Its totient is φ = 57612467200.

The previous prime is 72019789381. The next prime is 72019789463. The reversal of 72019789445 is 54498791027.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 10208879521 + 61810909924 = 101039^2 + 248618^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 72019789445 - 2⁶ = 72019789381 is a prime.

It is a congruent number.

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, 324356 + ... + 499245.

It is an arithmetic number, because the mean of its divisors is an integer number (10803599235).

Almost surely, 2^72019789445 is an apocalyptic number.

It is an amenable number.

72019789445 is a deficient number, since it is larger than the sum of its proper divisors (14409004435).

72019789445 is a wasteful number, since it uses less digits than its factorization.

72019789445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 841095.

The product of its (nonzero) digits is 5080320, while the sum is 56.

The spelling of 72019789445 in words is "seventy-two billion, nineteen million, seven hundred eighty-nine thousand, four hundred forty-five".