64945899 has 24 divisors (see below), whose sum is σ = 102540672. Its totient is φ = 39432960.

The previous prime is 64945889. The next prime is 64945913. The reversal of 64945899 is 99854946.

It is not a de Polignac number, because 64945899 - 2¹² = 64941803 is a prime.

It is not an unprimeable number, because it can be changed into a prime (64945889) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2104 + ... + 11589.

It is an arithmetic number, because the mean of its divisors is an integer number (4272528).

Almost surely, 2^64945899 is an apocalyptic number.

64945899 is a deficient number, since it is larger than the sum of its proper divisors (37594773).

64945899 is a wasteful number, since it uses less digits than its factorization.

64945899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13747 (or 13744 counting only the distinct ones).

The product of its digits is 2799360, while the sum is 54.

The square root of 64945899 is about 8058.9018482669. The cubic root of 64945899 is about 401.9609934678.

The spelling of 64945899 in words is "sixty-four million, nine hundred forty-five thousand, eight hundred ninety-nine".