18064539647 has 16 divisors (see below), whose sum is σ = 22581484800. Its totient is φ = 14039101440.

The previous prime is 18064539539. The next prime is 18064539653. The reversal of 18064539647 is 74693546081.

It is a de Polignac number, because none of the positive numbers 2^k-18064539647 is a prime.

It is a Smith number, since the sum of its digits (53) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18064239647) 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, 280322 + ... + 338687.

It is an arithmetic number, because the mean of its divisors is an integer number (1411342800).

Almost surely, 2^18064539647 is an apocalyptic number.

18064539647 is a deficient number, since it is larger than the sum of its proper divisors (4516945153).

18064539647 is a wasteful number, since it uses less digits than its factorization.

18064539647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 619406.

The product of its (nonzero) digits is 4354560, while the sum is 53.

The spelling of 18064539647 in words is "eighteen billion, sixty-four million, five hundred thirty-nine thousand, six hundred forty-seven".