16691150225 has 12 divisors (see below), whose sum is σ = 21201833100. Its totient is φ = 13027238400.

The previous prime is 16691150221. The next prime is 16691150227. The reversal of 16691150225 is 52205119661.

It can be written as a sum of positive squares in 6 ways, for example, as 2793333904 + 13897816321 = 52852^2 + 117889^2 .

It is not a de Polignac number, because 16691150225 - 2² = 16691150221 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16691150221) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8141000 + ... + 8143049.

It is an arithmetic number, because the mean of its divisors is an integer number (1766819425).

Almost surely, 2^16691150225 is an apocalyptic number.

It is an amenable number.

16691150225 is a deficient number, since it is larger than the sum of its proper divisors (4510682875).

16691150225 is a wasteful number, since it uses less digits than its factorization.

16691150225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16284100 (or 16284095 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 38.

Adding to 16691150225 its reverse (52205119661), we get a palindrome (68896269886).

The spelling of 16691150225 in words is "sixteen billion, six hundred ninety-one million, one hundred fifty thousand, two hundred twenty-five".