18365654564 has 12 divisors (see below), whose sum is σ = 32458112988. Its totient is φ = 9091908000.

The previous prime is 18365654521. The next prime is 18365654627. The reversal of 18365654564 is 46545656381.

It can be written as a sum of positive squares in 2 ways, for example, as 10194940900 + 8170713664 = 100970^2 + 90392^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22729367 + ... + 22730174.

It is an arithmetic number, because the mean of its divisors is an integer number (2704842749).

Almost surely, 2^18365654564 is an apocalyptic number.

It is an amenable number.

18365654564 is a deficient number, since it is larger than the sum of its proper divisors (14092458424).

18365654564 is a wasteful number, since it uses less digits than its factorization.

18365654564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45459646 (or 45459644 counting only the distinct ones).

The product of its digits is 10368000, while the sum is 53.

The spelling of 18365654564 in words is "eighteen billion, three hundred sixty-five million, six hundred fifty-four thousand, five hundred sixty-four".