205152189269 has 4 divisors (see below), whose sum is σ = 214071849696. Its totient is φ = 196232528844.

The previous prime is 205152189257. The next prime is 205152189283. The reversal of 205152189269 is 962981251502.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 205152189269 - 2³² = 200857221973 is a prime.

It is a super-2 number, since 2×205152189269² (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 (205152189289) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4459830179 + ... + 4459830224.

It is an arithmetic number, because the mean of its divisors is an integer number (53517962424).

Almost surely, 2^205152189269 is an apocalyptic number.

It is an amenable number.

205152189269 is a deficient number, since it is larger than the sum of its proper divisors (8919660427).

205152189269 is an equidigital number, since it uses as much as digits as its factorization.

205152189269 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8919660426.

The product of its (nonzero) digits is 777600, while the sum is 50.

The spelling of 205152189269 in words is "two hundred five billion, one hundred fifty-two million, one hundred eighty-nine thousand, two hundred sixty-nine".