229564748891 has 2 divisors, whose sum is σ = 229564748892. Its totient is φ = 229564748890.

The previous prime is 229564748887. The next prime is 229564748927. The reversal of 229564748891 is 198847465922.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 229564748891 - 2² = 229564748887 is a prime.

It is not a weakly prime, because it can be changed into another prime (229564747891) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 114782374445 + 114782374446.

It is an arithmetic number, because the mean of its divisors is an integer number (114782374446).

Almost surely, 2^229564748891 is an apocalyptic number.

229564748891 is a deficient number, since it is larger than the sum of its proper divisors (1).

229564748891 is an equidigital number, since it uses as much as digits as its factorization.

229564748891 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 69672960, while the sum is 65.

The spelling of 229564748891 in words is "two hundred twenty-nine billion, five hundred sixty-four million, seven hundred forty-eight thousand, eight hundred ninety-one".