72120501445 has 4 divisors (see below), whose sum is σ = 86544601740. Its totient is φ = 57696401152.

The previous prime is 72120501443. The next prime is 72120501503. The reversal of 72120501445 is 54410502127.

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

It can be written as a sum of positive squares in 2 ways, for example, as 50967126081 + 21153375364 = 225759^2 + 145442^2 .

It is a cyclic number.

It is not a de Polignac number, because 72120501445 - 2¹ = 72120501443 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72120501443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7212050140 + ... + 7212050149.

It is an arithmetic number, because the mean of its divisors is an integer number (21636150435).

Almost surely, 2^72120501445 is an apocalyptic number.

It is an amenable number.

72120501445 is a deficient number, since it is larger than the sum of its proper divisors (14424100295).

72120501445 is a wasteful number, since it uses less digits than its factorization.

72120501445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14424100294.

The product of its (nonzero) digits is 11200, while the sum is 31.

The spelling of 72120501445 in words is "seventy-two billion, one hundred twenty million, five hundred one thousand, four hundred forty-five".