18653396649 has 8 divisors (see below), whose sum is σ = 24875605440. Its totient is φ = 12433392816.

The previous prime is 18653396627. The next prime is 18653396669. The reversal of 18653396649 is 94669335681.

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

It is not a de Polignac number, because 18653396649 - 2⁷ = 18653396521 is a prime.

It is a Smith number, since the sum of its digits (60) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 18653396592 and 18653396601.

It is not an unprimeable number, because it can be changed into a prime (18653396669) by changing a digit.

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 in 7 ways as a sum of consecutive naturals, for example, 531397 + ... + 565410.

It is an arithmetic number, because the mean of its divisors is an integer number (3109450680).

Almost surely, 2^18653396649 is an apocalyptic number.

It is an amenable number.

18653396649 is a deficient number, since it is larger than the sum of its proper divisors (6222208791).

18653396649 is a wasteful number, since it uses less digits than its factorization.

18653396649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1102479.

The product of its digits is 25194240, while the sum is 60.

The spelling of 18653396649 in words is "eighteen billion, six hundred fifty-three million, three hundred ninety-six thousand, six hundred forty-nine".