205996526319 has 4 divisors (see below), whose sum is σ = 274662035096. Its totient is φ = 137331017544.

The previous prime is 205996526311. The next prime is 205996526321. The reversal of 205996526319 is 913625699502.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 205996526319 - 2³ = 205996526311 is a prime.

It is a super-2 number, since 2×205996526319² (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 (205996526311) 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, 34332754384 + ... + 34332754389.

It is an arithmetic number, because the mean of its divisors is an integer number (68665508774).

Almost surely, 2^205996526319 is an apocalyptic number.

205996526319 is a deficient number, since it is larger than the sum of its proper divisors (68665508777).

205996526319 is an equidigital number, since it uses as much as digits as its factorization.

205996526319 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68665508776.

The product of its (nonzero) digits is 7873200, while the sum is 57.

The spelling of 205996526319 in words is "two hundred five billion, nine hundred ninety-six million, five hundred twenty-six thousand, three hundred nineteen".