18315588361 has 16 divisors (see below), whose sum is σ = 21809295360. Its totient is φ = 15050647440.

The previous prime is 18315588331. The next prime is 18315588373. The reversal of 18315588361 is 16388551381.

It is a cyclic number.

It is not a de Polignac number, because 18315588361 - 2⁷ = 18315588233 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18315588301) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 371191 + ... + 417628.

It is an arithmetic number, because the mean of its divisors is an integer number (1363080960).

Almost surely, 2^18315588361 is an apocalyptic number.

It is an amenable number.

18315588361 is a deficient number, since it is larger than the sum of its proper divisors (3493706999).

18315588361 is a wasteful number, since it uses less digits than its factorization.

18315588361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 788964.

The product of its digits is 691200, while the sum is 49.

The spelling of 18315588361 in words is "eighteen billion, three hundred fifteen million, five hundred eighty-eight thousand, three hundred sixty-one".