64518899 has 2 divisors, whose sum is σ = 64518900. Its totient is φ = 64518898.

The previous prime is 64518847. The next prime is 64518943. The reversal of 64518899 is 99881546.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64518899 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (64518809) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32259449 + 32259450.

It is an arithmetic number, because the mean of its divisors is an integer number (32259450).

Almost surely, 2^64518899 is an apocalyptic number.

64518899 is a deficient number, since it is larger than the sum of its proper divisors (1).

64518899 is an equidigital number, since it uses as much as digits as its factorization.

64518899 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 622080, while the sum is 50.

The square root of 64518899 is about 8032.3657162756. The cubic root of 64518899 is about 401.0781310561.

The spelling of 64518899 in words is "sixty-four million, five hundred eighteen thousand, eight hundred ninety-nine".