16712542729 has 3 divisors (see below), whose sum is σ = 16712672007. Its totient is φ = 16712413452.

The previous prime is 16712542727. The next prime is 16712542753. The reversal of 16712542729 is 92724521761.

The square root of 16712542729 is 129277.

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

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 10667791225 + 6044751504 = 103285^2 + 77748^2 .

It is not a de Polignac number, because 16712542729 - 2¹ = 16712542727 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16712542727) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 64639 + ... + 193915.

It is an arithmetic number, because the mean of its divisors is an integer number (5570890669).

Almost surely, 2^16712542729 is an apocalyptic number.

16712542729 is the 129277-th square number.

16712542729 is the 64639-th centered octagonal number.

It is an amenable number.

16712542729 is a deficient number, since it is larger than the sum of its proper divisors (129278).

16712542729 is an frugal number, since it uses more digits than its factorization.

16712542729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 258554 (or 129277 counting only the distinct ones).

The product of its digits is 423360, while the sum is 46.

The spelling of 16712542729 in words is "sixteen billion, seven hundred twelve million, five hundred forty-two thousand, seven hundred twenty-nine".