16699617529 has 9 divisors (see below), whose sum is σ = 19427138031. Its totient is φ = 14313182520.

The previous prime is 16699617523. The next prime is 16699617533. The reversal of 16699617529 is 92571699661.

The square root of 16699617529 is 129227.

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

It can be written as a sum of positive squares in only one way, i.e., 788317929 + 15911299600 = 28077^2 + 126140^2 .

It is not a de Polignac number, because 16699617529 - 2⁷ = 16699617401 is a prime.

It is a super-2 number, since 2×16699617529² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (16699617523) 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 8 ways as a sum of consecutive naturals, for example, 895359 + ... + 913819.

Almost surely, 2^16699617529 is an apocalyptic number.

16699617529 is the 129227-th square number.

16699617529 is the 64614-th centered octagonal number.

It is an amenable number.

16699617529 is a deficient number, since it is larger than the sum of its proper divisors (2727520502).

16699617529 is an frugal number, since it uses more digits than its factorization.

16699617529 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36936 (or 18468 counting only the distinct ones).

The product of its digits is 11022480, while the sum is 61.

The spelling of 16699617529 in words is "sixteen billion, six hundred ninety-nine million, six hundred seventeen thousand, five hundred twenty-nine".