18364639575 has 24 divisors (see below), whose sum is σ = 30371533776. Its totient is φ = 9791680000.

The previous prime is 18364639561. The next prime is 18364639583. The reversal of 18364639575 is 57593646381.

It is not a de Polignac number, because 18364639575 - 2¹⁴ = 18364623191 is a prime.

It is a congruent number.

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 23 ways as a sum of consecutive naturals, for example, 244495 + ... + 310655.

It is an arithmetic number, because the mean of its divisors is an integer number (1265480574).

Almost surely, 2^18364639575 is an apocalyptic number.

18364639575 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

18364639575 is a deficient number, since it is larger than the sum of its proper divisors (12006894201).

18364639575 is a wasteful number, since it uses less digits than its factorization.

18364639575 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69875 (or 69870 counting only the distinct ones).

The product of its digits is 16329600, while the sum is 57.

The spelling of 18364639575 in words is "eighteen billion, three hundred sixty-four million, six hundred thirty-nine thousand, five hundred seventy-five".