2855838805686 has 80 divisors (see below), whose sum is σ = 6526309482000. Its totient is φ = 933129087552.

The previous prime is 2855838805681. The next prime is 2855838805789. The reversal of 2855838805686 is 6865088385582.

2855838805686 is a `hidden beast` number, since 2 + 8 + 5 + 58 + 3 + 8 + 8 + 0 + 568 + 6 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2855838805681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 2907676 + ... + 3763808.

It is an arithmetic number, because the mean of its divisors is an integer number (81578868525).

Almost surely, 2^{2855838805686} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2855838805686, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3263154741000).

2855838805686 is an abundant number, since it is smaller than the sum of its proper divisors (3670470676314).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2855838805686 is a wasteful number, since it uses less digits than its factorization.

2855838805686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 856555 (or 856546 counting only the distinct ones).

The product of its (nonzero) digits is 884736000, while the sum is 72.

The spelling of 2855838805686 in words is "two trillion, eight hundred fifty-five billion, eight hundred thirty-eight million, eight hundred five thousand, six hundred eighty-six".