205605036406556 has 36 divisors (see below), whose sum is σ = 385619389368192. Its totient is φ = 95589584390784.

The previous prime is 205605036406547. The next prime is 205605036406577. The reversal of 205605036406556 is 655604630506502.

It is a super-2 number, since 2×205605036406556² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 205605036406498 and 205605036406507.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 218983100 + ... + 219920003.

It is an arithmetic number, because the mean of its divisors is an integer number (10711649704672).

Almost surely, 2^{205605036406556} is an apocalyptic number.

It is an amenable number.

205605036406556 is a deficient number, since it is larger than the sum of its proper divisors (180014352961636).

205605036406556 is a wasteful number, since it uses less digits than its factorization.

205605036406556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 438903290 (or 438903205 counting only the distinct ones).

The product of its (nonzero) digits is 19440000, while the sum is 53.

The spelling of 205605036406556 in words is "two hundred five trillion, six hundred five billion, thirty-six million, four hundred six thousand, five hundred fifty-six".