205815159086 has 16 divisors (see below), whose sum is σ = 331885589760. Its totient is φ = 95417105400.

The previous prime is 205815159041. The next prime is 205815159101. The reversal of 205815159086 is 680951518502.

It is a happy number.

205815159086 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 57617240 + ... + 57620811.

It is an arithmetic number, because the mean of its divisors is an integer number (20742849360).

Almost surely, 2^205815159086 is an apocalyptic number.

205815159086 is a deficient number, since it is larger than the sum of its proper divisors (126070430674).

205815159086 is a wasteful number, since it uses less digits than its factorization.

205815159086 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115238119.

The product of its (nonzero) digits is 864000, while the sum is 50.

The spelling of 205815159086 in words is "two hundred five billion, eight hundred fifteen million, one hundred fifty-nine thousand, eighty-six".