200011281661 has 2 divisors, whose sum is σ = 200011281662. Its totient is φ = 200011281660.

The previous prime is 200011281649. The next prime is 200011281677. The reversal of 200011281661 is 166182110002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 113107779225 + 86903502436 = 336315^2 + 294794^2 .

It is a cyclic number.

It is not a de Polignac number, because 200011281661 - 2⁵ = 200011281629 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (200011281061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100005640830 + 100005640831.

It is an arithmetic number, because the mean of its divisors is an integer number (100005640831).

Almost surely, 2^200011281661 is an apocalyptic number.

It is an amenable number.

200011281661 is a deficient number, since it is larger than the sum of its proper divisors (1).

200011281661 is an equidigital number, since it uses as much as digits as its factorization.

200011281661 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1152, while the sum is 28.

Adding to 200011281661 its reverse (166182110002), we get a palindrome (366193391663).

The spelling of 200011281661 in words is "two hundred billion, eleven million, two hundred eighty-one thousand, six hundred sixty-one".