205136805743 has 2 divisors, whose sum is σ = 205136805744. Its totient is φ = 205136805742.

The previous prime is 205136805707. The next prime is 205136805751. The reversal of 205136805743 is 347508631502.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-205136805743 is a prime.

It is a super-2 number, since 2×205136805743² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 205136805694 and 205136805703.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (205136805773) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102568402871 + 102568402872.

It is an arithmetic number, because the mean of its divisors is an integer number (102568402872).

Almost surely, 2^205136805743 is an apocalyptic number.

205136805743 is a deficient number, since it is larger than the sum of its proper divisors (1).

205136805743 is an equidigital number, since it uses as much as digits as its factorization.

205136805743 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 604800, while the sum is 44.

The spelling of 205136805743 in words is "two hundred five billion, one hundred thirty-six million, eight hundred five thousand, seven hundred forty-three".