2005206115663 has 2 divisors, whose sum is σ = 2005206115664. Its totient is φ = 2005206115662.

The previous prime is 2005206115643. The next prime is 2005206115667. The reversal of 2005206115663 is 3665116025002.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2005206115663 - 2⁵ = 2005206115631 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2005206115667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1002603057831 + 1002603057832.

It is an arithmetic number, because the mean of its divisors is an integer number (1002603057832).

Almost surely, 2^{2005206115663} is an apocalyptic number.

2005206115663 is a deficient number, since it is larger than the sum of its proper divisors (1).

2005206115663 is an equidigital number, since it uses as much as digits as its factorization.

2005206115663 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64800, while the sum is 37.

The spelling of 2005206115663 in words is "two trillion, five billion, two hundred six million, one hundred fifteen thousand, six hundred sixty-three".