18546046865 has 8 divisors (see below), whose sum is σ = 22265026728. Its totient is φ = 14830323840.

The previous prime is 18546046829. The next prime is 18546046867. The reversal of 18546046865 is 56864064581.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 6288014209 + 12258032656 = 79297^2 + 110716^2 .

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

It is not a de Polignac number, because 18546046865 - 2³² = 14251079569 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18546046867) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 801662 + ... + 824471.

It is an arithmetic number, because the mean of its divisors is an integer number (2783128341).

Almost surely, 2^18546046865 is an apocalyptic number.

It is an amenable number.

18546046865 is a deficient number, since it is larger than the sum of its proper divisors (3718979863).

18546046865 is a wasteful number, since it uses less digits than its factorization.

18546046865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1628419.

The product of its (nonzero) digits is 5529600, while the sum is 53.

The spelling of 18546046865 in words is "eighteen billion, five hundred forty-six million, forty-six thousand, eight hundred sixty-five".