229771809661 has 2 divisors, whose sum is σ = 229771809662. Its totient is φ = 229771809660.

The previous prime is 229771809647. The next prime is 229771809677. The reversal of 229771809661 is 166908177922.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 134549576100 + 95222233561 = 366810^2 + 308581^2 .

It is a cyclic number.

It is not a de Polignac number, because 229771809661 - 2⁹ = 229771809149 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 229771809596 and 229771809605.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (229771809461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 114885904830 + 114885904831.

It is an arithmetic number, because the mean of its divisors is an integer number (114885904831).

Almost surely, 2^229771809661 is an apocalyptic number.

It is an amenable number.

229771809661 is a deficient number, since it is larger than the sum of its proper divisors (1).

229771809661 is an equidigital number, since it uses as much as digits as its factorization.

229771809661 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4572288, while the sum is 58.

The spelling of 229771809661 in words is "two hundred twenty-nine billion, seven hundred seventy-one million, eight hundred nine thousand, six hundred sixty-one".