18375722764801 has 4 divisors (see below), whose sum is σ = 18766695589632. Its totient is φ = 17984749939972.

The previous prime is 18375722764769. The next prime is 18375722764811. The reversal of 18375722764801 is 10846722757381.

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 a cyclic number.

It is not a de Polignac number, because 18375722764801 - 2⁵ = 18375722764769 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 18375722764801.

It is not an unprimeable number, because it can be changed into a prime (18375722764811) 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, 195486412345 + ... + 195486412438.

It is an arithmetic number, because the mean of its divisors is an integer number (4691673897408).

Almost surely, 2^{18375722764801} is an apocalyptic number.

It is an amenable number.

18375722764801 is a deficient number, since it is larger than the sum of its proper divisors (390972824831).

18375722764801 is an equidigital number, since it uses as much as digits as its factorization.

18375722764801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 390972824830.

The product of its (nonzero) digits is 31610880, while the sum is 61.

The spelling of 18375722764801 in words is "eighteen trillion, three hundred seventy-five billion, seven hundred twenty-two million, seven hundred sixty-four thousand, eight hundred one".