16281746729 has 2 divisors, whose sum is σ = 16281746730. Its totient is φ = 16281746728.

The previous prime is 16281746683. The next prime is 16281746743. The reversal of 16281746729 is 92764718261.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10757838400 + 5523908329 = 103720^2 + 74323^2 .

It is a cyclic number.

It is not a de Polignac number, because 16281746729 - 2⁸ = 16281746473 is a prime.

It is not a weakly prime, because it can be changed into another prime (16281740729) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8140873364 + 8140873365.

It is an arithmetic number, because the mean of its divisors is an integer number (8140873365).

Almost surely, 2^16281746729 is an apocalyptic number.

It is an amenable number.

16281746729 is a deficient number, since it is larger than the sum of its proper divisors (1).

16281746729 is an equidigital number, since it uses as much as digits as its factorization.

16281746729 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2032128, while the sum is 53.

The spelling of 16281746729 in words is "sixteen billion, two hundred eighty-one million, seven hundred forty-six thousand, seven hundred twenty-nine".