205571117134 has 24 divisors (see below), whose sum is σ = 322441514640. Its totient is φ = 98287609728.

The previous prime is 205571117131. The next prime is 205571117149. The reversal of 205571117134 is 431711175502.

It is a junction number, because it is equal to n+sod(n) for n = 205571117093 and 205571117102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205571117131) 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 11 ways as a sum of consecutive naturals, for example, 3799927 + ... + 3853645.

It is an arithmetic number, because the mean of its divisors is an integer number (13435063110).

Almost surely, 2^205571117134 is an apocalyptic number.

205571117134 is a deficient number, since it is larger than the sum of its proper divisors (116870397506).

205571117134 is a wasteful number, since it uses less digits than its factorization.

205571117134 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57384 (or 57361 counting only the distinct ones).

The product of its (nonzero) digits is 29400, while the sum is 37.

The spelling of 205571117134 in words is "two hundred five billion, five hundred seventy-one million, one hundred seventeen thousand, one hundred thirty-four".