18546555316 has 6 divisors (see below), whose sum is σ = 32456471810. Its totient is φ = 9273277656.

The previous prime is 18546555289. The next prime is 18546555323. The reversal of 18546555316 is 61355564581.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 18537911716 + 8643600 = 136154^2 + 2940^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 18546555316.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 2318319411 + ... + 2318319418.

Almost surely, 2^18546555316 is an apocalyptic number.

It is an amenable number.

18546555316 is a deficient number, since it is larger than the sum of its proper divisors (13909916494).

18546555316 is a wasteful number, since it uses less digits than its factorization.

18546555316 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4636638833 (or 4636638831 counting only the distinct ones).

The product of its digits is 2160000, while the sum is 49.

The spelling of 18546555316 in words is "eighteen billion, five hundred forty-six million, five hundred fifty-five thousand, three hundred sixteen".