64185073187 has 2 divisors, whose sum is σ = 64185073188. Its totient is φ = 64185073186.

The previous prime is 64185073181. The next prime is 64185073207. The reversal of 64185073187 is 78137058146.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 64185073187 - 2⁴ = 64185073171 is a prime.

It is not a weakly prime, because it can be changed into another prime (64185073181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32092536593 + 32092536594.

It is an arithmetic number, because the mean of its divisors is an integer number (32092536594).

Almost surely, 2^64185073187 is an apocalyptic number.

64185073187 is a deficient number, since it is larger than the sum of its proper divisors (1).

64185073187 is an equidigital number, since it uses as much as digits as its factorization.

64185073187 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1128960, while the sum is 50.

The spelling of 64185073187 in words is "sixty-four billion, one hundred eighty-five million, seventy-three thousand, one hundred eighty-seven".