64583085809 has 4 divisors (see below), whose sum is σ = 70454275440. Its totient is φ = 58711896180.

The previous prime is 64583085779. The next prime is 64583085851. The reversal of 64583085809 is 90858038546.

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 64583085809 - 2¹⁶ = 64583020273 is a prime.

It is a super-2 number, since 2×64583085809² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (64583085209) 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, 2935594799 + ... + 2935594820.

It is an arithmetic number, because the mean of its divisors is an integer number (17613568860).

Almost surely, 2^64583085809 is an apocalyptic number.

It is an amenable number.

64583085809 is a deficient number, since it is larger than the sum of its proper divisors (5871189631).

64583085809 is a wasteful number, since it uses less digits than its factorization.

64583085809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5871189630.

The product of its (nonzero) digits is 8294400, while the sum is 56.

The spelling of 64583085809 in words is "sixty-four billion, five hundred eighty-three million, eighty-five thousand, eight hundred nine".