18344164399 has 8 divisors (see below), whose sum is σ = 20552676048. Its totient is φ = 16225796160.

The previous prime is 18344164393. The next prime is 18344164429. The reversal of 18344164399 is 99346144381.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18344164399 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18344164393) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22535422 + ... + 22536235.

It is an arithmetic number, because the mean of its divisors is an integer number (2569084506).

Almost surely, 2^18344164399 is an apocalyptic number.

18344164399 is a deficient number, since it is larger than the sum of its proper divisors (2208511649).

18344164399 is a wasteful number, since it uses less digits than its factorization.

18344164399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45071705.

The product of its digits is 2239488, while the sum is 52.

The spelling of 18344164399 in words is "eighteen billion, three hundred forty-four million, one hundred sixty-four thousand, three hundred ninety-nine".