18378606049 has 8 divisors (see below), whose sum is σ = 18808083360. Its totient is φ = 17949222816.

The previous prime is 18378606047. The next prime is 18378606079. The reversal of 18378606049 is 94060687381.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 18378606049 - 2¹ = 18378606047 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18378605987 and 18378606005.

It is not an unprimeable number, because it can be changed into a prime (18378606047) 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, 512814 + ... + 547480.

It is an arithmetic number, because the mean of its divisors is an integer number (2351010420).

Almost surely, 2^18378606049 is an apocalyptic number.

It is an amenable number.

18378606049 is a deficient number, since it is larger than the sum of its proper divisors (429477311).

18378606049 is a wasteful number, since it uses less digits than its factorization.

18378606049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47039.

The product of its (nonzero) digits is 1741824, while the sum is 52.

The spelling of 18378606049 in words is "eighteen billion, three hundred seventy-eight million, six hundred six thousand, forty-nine".