64683557609 has 16 divisors (see below), whose sum is σ = 70811262720. Its totient is φ = 58597300560.

The previous prime is 64683557569. The next prime is 64683557621. The reversal of 64683557609 is 90675538646.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64683557609 is a prime.

It is not an unprimeable number, because it can be changed into a prime (64683527609) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7549562 + ... + 7558124.

It is an arithmetic number, because the mean of its divisors is an integer number (4425703920).

Almost surely, 2^64683557609 is an apocalyptic number.

It is an amenable number.

64683557609 is a deficient number, since it is larger than the sum of its proper divisors (6127705111).

64683557609 is a wasteful number, since it uses less digits than its factorization.

64683557609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10900.

The product of its (nonzero) digits is 32659200, while the sum is 59.

The spelling of 64683557609 in words is "sixty-four billion, six hundred eighty-three million, five hundred fifty-seven thousand, six hundred nine".