72164446187 has 2 divisors, whose sum is σ = 72164446188. Its totient is φ = 72164446186.

The previous prime is 72164446181. The next prime is 72164446199. The reversal of 72164446187 is 78164446127.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 72164446187 - 2¹⁰ = 72164445163 is a prime.

It is not a weakly prime, because it can be changed into another prime (72164446181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36082223093 + 36082223094.

It is an arithmetic number, because the mean of its divisors is an integer number (36082223094).

Almost surely, 2^72164446187 is an apocalyptic number.

72164446187 is a deficient number, since it is larger than the sum of its proper divisors (1).

72164446187 is an equidigital number, since it uses as much as digits as its factorization.

72164446187 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1806336, while the sum is 50.

The spelling of 72164446187 in words is "seventy-two billion, one hundred sixty-four million, four hundred forty-six thousand, one hundred eighty-seven".