18773120065 has 16 divisors (see below), whose sum is σ = 25769515392. Its totient is φ = 12861235584.

The previous prime is 18773120039. The next prime is 18773120081. The reversal of 18773120065 is 56002137781.

It is a cyclic number.

It is not a de Polignac number, because 18773120065 - 2⁵ = 18773120033 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 206079 + ... + 282868.

It is an arithmetic number, because the mean of its divisors is an integer number (1610594712).

Almost surely, 2^18773120065 is an apocalyptic number.

It is an amenable number.

18773120065 is a deficient number, since it is larger than the sum of its proper divisors (6996395327).

18773120065 is a wasteful number, since it uses less digits than its factorization.

18773120065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 490056.

The product of its (nonzero) digits is 70560, while the sum is 40.

The spelling of 18773120065 in words is "eighteen billion, seven hundred seventy-three million, one hundred twenty thousand, sixty-five".