64335232009 has 4 divisors (see below), whose sum is σ = 64959846016. Its totient is φ = 63710618004.

The previous prime is 64335232007. The next prime is 64335232019. The reversal of 64335232009 is 90023253346.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 64335232009 - 2¹ = 64335232007 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64335232007) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 312306849 + ... + 312307054.

It is an arithmetic number, because the mean of its divisors is an integer number (16239961504).

Almost surely, 2^64335232009 is an apocalyptic number.

It is an amenable number.

64335232009 is a deficient number, since it is larger than the sum of its proper divisors (624614007).

64335232009 is a wasteful number, since it uses less digits than its factorization.

64335232009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 624614006.

The product of its (nonzero) digits is 116640, while the sum is 37.

The spelling of 64335232009 in words is "sixty-four billion, three hundred thirty-five million, two hundred thirty-two thousand, nine".