16931995129 has 27 divisors (see below), whose sum is σ = 20430882381. Its totient is φ = 13990824960.

The previous prime is 16931995117. The next prime is 16931995159. The reversal of 16931995129 is 92159913961.

The square root of 16931995129 is 130123.

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

It can be written as a sum of positive squares in 4 ways, for example, as 3785079529 + 13146915600 = 61523^2 + 114660^2 .

It is not a de Polignac number, because 16931995129 - 2²⁹ = 16395124217 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 16931995129.

It is not an unprimeable number, because it can be changed into a prime (16931995109) 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, 26414649 + ... + 26415289.

Almost surely, 2^16931995129 is an apocalyptic number.

16931995129 is the 130123-rd square number.

16931995129 is the 65062-nd centered octagonal number.

It is an amenable number.

16931995129 is a deficient number, since it is larger than the sum of its proper divisors (3498887252).

16931995129 is an frugal number, since it uses more digits than its factorization.

16931995129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1354 (or 677 counting only the distinct ones).

The product of its digits is 1180980, while the sum is 55.

The spelling of 16931995129 in words is "sixteen billion, nine hundred thirty-one million, nine hundred ninety-five thousand, one hundred twenty-nine".