72445323187 has 2 divisors, whose sum is σ = 72445323188. Its totient is φ = 72445323186.

The previous prime is 72445323143. The next prime is 72445323191. The reversal of 72445323187 is 78132354427.

It is a strong prime.

It is an emirp because it is prime and its reverse (78132354427) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72445323187 is a prime.

It is not a weakly prime, because it can be changed into another prime (72445323787) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36222661593 + 36222661594.

It is an arithmetic number, because the mean of its divisors is an integer number (36222661594).

Almost surely, 2^72445323187 is an apocalyptic number.

72445323187 is a deficient number, since it is larger than the sum of its proper divisors (1).

72445323187 is an equidigital number, since it uses as much as digits as its factorization.

72445323187 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1128960, while the sum is 46.

The spelling of 72445323187 in words is "seventy-two billion, four hundred forty-five million, three hundred twenty-three thousand, one hundred eighty-seven".