18356764220648 has 32 divisors (see below), whose sum is σ = 39341382211200. Its totient is φ = 7866092889792.

The previous prime is 18356764220611. The next prime is 18356764220651. The reversal of 18356764220648 is 84602246765381.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22338143 + ... + 23145326.

It is an arithmetic number, because the mean of its divisors is an integer number (1229418194100).

Almost surely, 2^{18356764220648} is an apocalyptic number.

It is an amenable number.

18356764220648 is an abundant number, since it is smaller than the sum of its proper divisors (20984617990552).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18356764220648 is a wasteful number, since it uses less digits than its factorization.

18356764220648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45490689 (or 45490685 counting only the distinct ones).

The product of its (nonzero) digits is 92897280, while the sum is 62.

The spelling of 18356764220648 in words is "eighteen trillion, three hundred fifty-six billion, seven hundred sixty-four million, two hundred twenty thousand, six hundred forty-eight".