205071634622107 has 4 divisors (see below), whose sum is σ = 223714510496856. Its totient is φ = 186428758747360.

The previous prime is 205071634622051. The next prime is 205071634622131. The reversal of 205071634622107 is 701226436170502.

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

It is a cyclic number.

It is not a de Polignac number, because 205071634622107 - 2³⁵ = 205037274883739 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (205071634622807) 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 3 ways as a sum of consecutive naturals, for example, 9321437937358 + ... + 9321437937379.

It is an arithmetic number, because the mean of its divisors is an integer number (55928627624214).

Almost surely, 2^{205071634622107} is an apocalyptic number.

205071634622107 is a deficient number, since it is larger than the sum of its proper divisors (18642875874749).

205071634622107 is a wasteful number, since it uses less digits than its factorization.

205071634622107 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18642875874748.

The product of its (nonzero) digits is 846720, while the sum is 46.

The spelling of 205071634622107 in words is "two hundred five trillion, seventy-one billion, six hundred thirty-four million, six hundred twenty-two thousand, one hundred seven".