16254693209 has 2 divisors, whose sum is σ = 16254693210. Its totient is φ = 16254693208.

The previous prime is 16254693199. The next prime is 16254693277. The reversal of 16254693209 is 90239645261.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13596259609 + 2658433600 = 116603^2 + 51560^2 .

It is a cyclic number.

It is not a de Polignac number, because 16254693209 - 2²⁰ = 16253644633 is a prime.

It is not a weakly prime, because it can be changed into another prime (16254693809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8127346604 + 8127346605.

It is an arithmetic number, because the mean of its divisors is an integer number (8127346605).

Almost surely, 2^16254693209 is an apocalyptic number.

It is an amenable number.

16254693209 is a deficient number, since it is larger than the sum of its proper divisors (1).

16254693209 is an equidigital number, since it uses as much as digits as its factorization.

16254693209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 699840, while the sum is 47.

The spelling of 16254693209 in words is "sixteen billion, two hundred fifty-four million, six hundred ninety-three thousand, two hundred nine".