690205504811 has 2 divisors, whose sum is σ = 690205504812. Its totient is φ = 690205504810.

The previous prime is 690205504777. The next prime is 690205504837. The reversal of 690205504811 is 118405502096.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-690205504811 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (690205504841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 345102752405 + 345102752406.

It is an arithmetic number, because the mean of its divisors is an integer number (345102752406).

Almost surely, 2^690205504811 is an apocalyptic number.

690205504811 is a deficient number, since it is larger than the sum of its proper divisors (1).

690205504811 is an equidigital number, since it uses as much as digits as its factorization.

690205504811 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 86400, while the sum is 41.

The spelling of 690205504811 in words is "six hundred ninety billion, two hundred five million, five hundred four thousand, eight hundred eleven".