855639384787 has 8 divisors (see below), whose sum is σ = 963535260672. Its totient is φ = 752761921800.

The previous prime is 855639384773. The next prime is 855639384791. The reversal of 855639384787 is 787483936558.

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 855639384787 - 2¹⁵ = 855639352019 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (855639384707) 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, 1254602863 + ... + 1254603544.

It is an arithmetic number, because the mean of its divisors is an integer number (120441907584).

Almost surely, 2^855639384787 is an apocalyptic number.

855639384787 is a deficient number, since it is larger than the sum of its proper divisors (107895875885).

855639384787 is a wasteful number, since it uses less digits than its factorization.

855639384787 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2509206449.

The product of its digits is 1219276800, while the sum is 73.

The spelling of 855639384787 in words is "eight hundred fifty-five billion, six hundred thirty-nine million, three hundred eighty-four thousand, seven hundred eighty-seven".