18308155655809 has 8 divisors (see below), whose sum is σ = 19190851761312. Its totient is φ = 17446228870560.

The previous prime is 18308155655773. The next prime is 18308155655813. The reversal of 18308155655809 is 90855655180381.

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

It is a cyclic number.

It is not a de Polignac number, because 18308155655809 - 2⁹ = 18308155655297 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18308155655869) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5192328259 + ... + 5192331784.

It is an arithmetic number, because the mean of its divisors is an integer number (2398856470164).

Almost surely, 2^{18308155655809} is an apocalyptic number.

It is an amenable number.

18308155655809 is a deficient number, since it is larger than the sum of its proper divisors (882696105503).

18308155655809 is a wasteful number, since it uses less digits than its factorization.

18308155655809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10384660127.

The product of its (nonzero) digits is 51840000, while the sum is 64.

The spelling of 18308155655809 in words is "eighteen trillion, three hundred eight billion, one hundred fifty-five million, six hundred fifty-five thousand, eight hundred nine".