239636664385 has 16 divisors (see below), whose sum is σ = 296985960000. Its totient is φ = 185485916736.

The previous prime is 239636664383. The next prime is 239636664401. The reversal of 239636664385 is 583466636932.

239636664385 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 239636664385 - 2¹ = 239636664383 is a prime.

It is not an unprimeable number, because it can be changed into a prime (239636664383) 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 15 ways as a sum of consecutive naturals, for example, 3585135 + ... + 3651364.

It is an arithmetic number, because the mean of its divisors is an integer number (18561622500).

Almost surely, 2^239636664385 is an apocalyptic number.

It is an amenable number.

239636664385 is a deficient number, since it is larger than the sum of its proper divisors (57349295615).

239636664385 is a wasteful number, since it uses less digits than its factorization.

239636664385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7236720.

The product of its digits is 100776960, while the sum is 61.

The spelling of 239636664385 in words is "two hundred thirty-nine billion, six hundred thirty-six million, six hundred sixty-four thousand, three hundred eighty-five".