18064781279 has 16 divisors (see below), whose sum is σ = 18974596800. Its totient is φ = 17165592576.

The previous prime is 18064781227. The next prime is 18064781327. The reversal of 18064781279 is 97218746081.

It is a happy number.

It is not a de Polignac number, because 18064781279 - 2¹² = 18064777183 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 18064781279.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18064781219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3677477 + ... + 3682385.

It is an arithmetic number, because the mean of its divisors is an integer number (1185912300).

Almost surely, 2^18064781279 is an apocalyptic number.

18064781279 is a deficient number, since it is larger than the sum of its proper divisors (909815521).

18064781279 is a wasteful number, since it uses less digits than its factorization.

18064781279 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5954.

The product of its (nonzero) digits is 1354752, while the sum is 53.

The spelling of 18064781279 in words is "eighteen billion, sixty-four million, seven hundred eighty-one thousand, two hundred seventy-nine".