205606156856 has 16 divisors (see below), whose sum is σ = 388923152400. Its totient is φ = 101893316224.

The previous prime is 205606156849. The next prime is 205606156871. The reversal of 205606156856 is 658651606502.

It is a super-3 number, since 3×205606156856³ (a number of 35 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 113719316 + ... + 113721123.

It is an arithmetic number, because the mean of its divisors is an integer number (24307697025).

Almost surely, 2^205606156856 is an apocalyptic number.

It is an amenable number.

205606156856 is a deficient number, since it is larger than the sum of its proper divisors (183316995544).

205606156856 is a wasteful number, since it uses less digits than its factorization.

205606156856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 227440558 (or 227440554 counting only the distinct ones).

The product of its (nonzero) digits is 2592000, while the sum is 50.

The spelling of 205606156856 in words is "two hundred five billion, six hundred six million, one hundred fifty-six thousand, eight hundred fifty-six".