64809099 has 16 divisors (see below), whose sum is σ = 98058240. Its totient is φ = 42285960.

The previous prime is 64809091. The next prime is 64809103. The reversal of 64809099 is 99090846.

It is not a de Polignac number, because 64809099 - 2³ = 64809091 is a prime.

It is not an unprimeable number, because it can be changed into a prime (64809091) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24267 + ... + 26804.

It is an arithmetic number, because the mean of its divisors is an integer number (6128640).

Almost surely, 2^64809099 is an apocalyptic number.

64809099 is a deficient number, since it is larger than the sum of its proper divisors (33249141).

64809099 is a wasteful number, since it uses less digits than its factorization.

64809099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51127 (or 51121 counting only the distinct ones).

The product of its (nonzero) digits is 139968, while the sum is 45.

The square root of 64809099 is about 8050.4098653423. The cubic root of 64809099 is about 401.6785690781.

The spelling of 64809099 in words is "sixty-four million, eight hundred nine thousand, ninety-nine".