205585047423 has 24 divisors (see below), whose sum is σ = 339908009376. Its totient is φ = 117293875200.

The previous prime is 205585047401. The next prime is 205585047511. The reversal of 205585047423 is 324740585502.

205585047423 is a `hidden beast` number, since 2 + 0 + 5 + 58 + 504 + 74 + 23 = 666.

It is not a de Polignac number, because 205585047423 - 2⁵ = 205585047391 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205585047023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2505058 + ... + 2585823.

It is an arithmetic number, because the mean of its divisors is an integer number (14162833724).

Almost surely, 2^205585047423 is an apocalyptic number.

205585047423 is a deficient number, since it is larger than the sum of its proper divisors (134322961953).

205585047423 is a wasteful number, since it uses less digits than its factorization.

205585047423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5091535 (or 5091532 counting only the distinct ones).

The product of its (nonzero) digits is 1344000, while the sum is 45.

The spelling of 205585047423 in words is "two hundred five billion, five hundred eighty-five million, forty-seven thousand, four hundred twenty-three".