18399542583801 has 4 divisors (see below), whose sum is σ = 24532723445072. Its totient is φ = 12266361722532.

The previous prime is 18399542583781. The next prime is 18399542583841. The reversal of 18399542583801 is 10838524599381.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 18399542583801 - 2⁵ = 18399542583769 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18399542583841) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3066590430631 + ... + 3066590430636.

It is an arithmetic number, because the mean of its divisors is an integer number (6133180861268).

Almost surely, 2^{18399542583801} is an apocalyptic number.

It is an amenable number.

18399542583801 is a deficient number, since it is larger than the sum of its proper divisors (6133180861271).

18399542583801 is an equidigital number, since it uses as much as digits as its factorization.

18399542583801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6133180861270.

The product of its (nonzero) digits is 74649600, while the sum is 66.

The spelling of 18399542583801 in words is "eighteen trillion, three hundred ninety-nine billion, five hundred forty-two million, five hundred eighty-three thousand, eight hundred one".