18153855613 has 4 divisors (see below), whose sum is σ = 18154129180. Its totient is φ = 18153582048.

The previous prime is 18153855611. The next prime is 18153855631. The reversal of 18153855613 is 31655835181.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 16466535684 + 1687319929 = 128322^2 + 41077^2 .

It is a cyclic number.

It is not a de Polignac number, because 18153855613 - 2¹ = 18153855611 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 (18153855611) 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 3 ways as a sum of consecutive naturals, for example, 33031 + ... + 193387.

It is an arithmetic number, because the mean of its divisors is an integer number (4538532295).

Almost surely, 2^18153855613 is an apocalyptic number.

It is an amenable number.

18153855613 is a deficient number, since it is larger than the sum of its proper divisors (273567).

18153855613 is a wasteful number, since it uses less digits than its factorization.

18153855613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 273566.

The product of its digits is 432000, while the sum is 46.

The spelling of 18153855613 in words is "eighteen billion, one hundred fifty-three million, eight hundred fifty-five thousand, six hundred thirteen".