205678364223 has 32 divisors (see below), whose sum is σ = 293221555200. Its totient is φ = 128012506496.

The previous prime is 205678364191. The next prime is 205678364237. The reversal of 205678364223 is 322463876502.

It is a cyclic number.

It is not a de Polignac number, because 205678364223 - 2⁵ = 205678364191 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205678364263) 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 31 ways as a sum of consecutive naturals, for example, 36373 + ... + 642401.

It is an arithmetic number, because the mean of its divisors is an integer number (9163173600).

Almost surely, 2^205678364223 is an apocalyptic number.

205678364223 is a deficient number, since it is larger than the sum of its proper divisors (87543190977).

205678364223 is a wasteful number, since it uses less digits than its factorization.

205678364223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 606191.

The product of its (nonzero) digits is 2903040, while the sum is 48.

The spelling of 205678364223 in words is "two hundred five billion, six hundred seventy-eight million, three hundred sixty-four thousand, two hundred twenty-three".