205812065591107 has 2 divisors, whose sum is σ = 205812065591108. Its totient is φ = 205812065591106.

The previous prime is 205812065590931. The next prime is 205812065591123. The reversal of 205812065591107 is 701195560218502.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-205812065591107 is a prime.

It is a super-2 number, since 2×205812065591107² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (205812065591507) 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 as a sum of consecutive naturals, namely, 102906032795553 + 102906032795554.

It is an arithmetic number, because the mean of its divisors is an integer number (102906032795554).

Almost surely, 2^{205812065591107} is an apocalyptic number.

205812065591107 is a deficient number, since it is larger than the sum of its proper divisors (1).

205812065591107 is an equidigital number, since it uses as much as digits as its factorization.

205812065591107 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1512000, while the sum is 52.

The spelling of 205812065591107 in words is "two hundred five trillion, eight hundred twelve billion, sixty-five million, five hundred ninety-one thousand, one hundred seven".