186145487009 has 2 divisors, whose sum is σ = 186145487010. Its totient is φ = 186145487008.

The previous prime is 186145486997. The next prime is 186145487041. The reversal of 186145487009 is 900784541681.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 144324010000 + 41821477009 = 379900^2 + 204503^2 .

It is a cyclic number.

It is not a de Polignac number, because 186145487009 - 2⁸ = 186145486753 is a prime.

It is not a weakly prime, because it can be changed into another prime (186145487069) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 93072743504 + 93072743505.

It is an arithmetic number, because the mean of its divisors is an integer number (93072743505).

Almost surely, 2^186145487009 is an apocalyptic number.

It is an amenable number.

186145487009 is a deficient number, since it is larger than the sum of its proper divisors (1).

186145487009 is an equidigital number, since it uses as much as digits as its factorization.

186145487009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1935360, while the sum is 53.

The spelling of 186145487009 in words is "one hundred eighty-six billion, one hundred forty-five million, four hundred eighty-seven thousand, nine".