229938009981849 has 27 divisors (see below), whose sum is σ = 359647555985757. Its totient is φ = 141499949906016.

The previous prime is 229938009981847. The next prime is 229938009981851. The reversal of 229938009981849 is 948189900839922.

The square root of 229938009981849 is 15163707.

It is a perfect power (a square), and thus also a powerful number.

229938009981849 is a `hidden beast` number, since 22 + 99 + 380 + 0 + 9 + 98 + 1 + 8 + 49 = 666.

It is an interprime number because it is at equal distance from previous prime (229938009981847) and next prime (229938009981851).

It can be written as a sum of positive squares in 4 ways, for example, as 3734003575449 + 226204006406400 = 1932357^2 + 15040080^2 .

It is not a de Polignac number, because 229938009981849 - 2¹ = 229938009981847 is a prime.

It is a super-2 number, since 2×229938009981849² (a number of 30 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (229938009981847) 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 in 26 ways as a sum of consecutive naturals, for example, 591190167 + ... + 591578979.

Almost surely, 2^{229938009981849} is an apocalyptic number.

229938009981849 is the 15163707-th square number.

229938009981849 is the 7581854-th centered octagonal number.

It is an amenable number.

229938009981849 is a deficient number, since it is larger than the sum of its proper divisors (129709546003908).

229938009981849 is an frugal number, since it uses more digits than its factorization.

229938009981849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 777658 (or 388829 counting only the distinct ones).

The product of its (nonzero) digits is 1451188224, while the sum is 81.

The spelling of 229938009981849 in words is "two hundred twenty-nine trillion, nine hundred thirty-eight billion, nine million, nine hundred eighty-one thousand, eight hundred forty-nine".