205042366623 has 8 divisors (see below), whose sum is σ = 273562969600. Its totient is φ = 136608337368.

The previous prime is 205042366619. The next prime is 205042366663. The reversal of 205042366623 is 326663240502.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 205042366623 - 2² = 205042366619 is a prime.

It is a super-2 number, since 2×205042366623² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205042366663) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21637903 + ... + 21647376.

It is an arithmetic number, because the mean of its divisors is an integer number (34195371200).

Almost surely, 2^205042366623 is an apocalyptic number.

205042366623 is a deficient number, since it is larger than the sum of its proper divisors (68520602977).

205042366623 is a wasteful number, since it uses less digits than its factorization.

205042366623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43286861.

The product of its (nonzero) digits is 311040, while the sum is 39.

The spelling of 205042366623 in words is "two hundred five billion, forty-two million, three hundred sixty-six thousand, six hundred twenty-three".