185288538089 has 2 divisors, whose sum is σ = 185288538090. Its totient is φ = 185288538088.

The previous prime is 185288538079. The next prime is 185288538133. The reversal of 185288538089 is 980835882581.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 185089248400 + 199289689 = 430220^2 + 14117^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-185288538089 is a prime.

It is not a weakly prime, because it can be changed into another prime (185288538079) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 92644269044 + 92644269045.

It is an arithmetic number, because the mean of its divisors is an integer number (92644269045).

Almost surely, 2^185288538089 is an apocalyptic number.

It is an amenable number.

185288538089 is a deficient number, since it is larger than the sum of its proper divisors (1).

185288538089 is an equidigital number, since it uses as much as digits as its factorization.

185288538089 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 44236800, while the sum is 65.

The spelling of 185288538089 in words is "one hundred eighty-five billion, two hundred eighty-eight million, five hundred thirty-eight thousand, eighty-nine".