18636144663275 has 24 divisors (see below), whose sum is σ = 23120463176304. Its totient is φ = 14901405552000.

The previous prime is 18636144663263. The next prime is 18636144663281. The reversal of 18636144663275 is 57236644163681.

It is a happy number.

It is not a de Polignac number, because 18636144663275 - 2⁴ = 18636144663259 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 469794992 + ... + 469834658.

It is an arithmetic number, because the mean of its divisors is an integer number (963352632346).

Almost surely, 2^{18636144663275} is an apocalyptic number.

18636144663275 is a deficient number, since it is larger than the sum of its proper divisors (4484318513029).

18636144663275 is a wasteful number, since it uses less digits than its factorization.

18636144663275 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48671 (or 48666 counting only the distinct ones).

The product of its digits is 104509440, while the sum is 62.

The spelling of 18636144663275 in words is "eighteen trillion, six hundred thirty-six billion, one hundred forty-four million, six hundred sixty-three thousand, two hundred seventy-five".