64500036609 has 16 divisors (see below), whose sum is σ = 86388141440. Its totient is φ = 42806413440.

The previous prime is 64500036563. The next prime is 64500036641. The reversal of 64500036609 is 90663000546.

It is a happy number.

It is not a de Polignac number, because 64500036609 - 2¹⁹ = 64499512321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64500036659) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 543579 + ... + 651519.

It is an arithmetic number, because the mean of its divisors is an integer number (5399258840).

Almost surely, 2^64500036609 is an apocalyptic number.

It is an amenable number.

64500036609 is a deficient number, since it is larger than the sum of its proper divisors (21888104831).

64500036609 is a wasteful number, since it uses less digits than its factorization.

64500036609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108840.

The product of its (nonzero) digits is 116640, while the sum is 39.

The spelling of 64500036609 in words is "sixty-four billion, five hundred million, thirty-six thousand, six hundred nine".