16000001609 has 2 divisors, whose sum is σ = 16000001610. Its totient is φ = 16000001608.

The previous prime is 16000001551. The next prime is 16000001651. The reversal of 16000001609 is 90610000061.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14531579209 + 1468422400 = 120547^2 + 38320^2 .

It is a cyclic number.

It is not a de Polignac number, because 16000001609 - 2²⁸ = 15731566153 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (16000001209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8000000804 + 8000000805.

It is an arithmetic number, because the mean of its divisors is an integer number (8000000805).

Almost surely, 2^16000001609 is an apocalyptic number.

It is an amenable number.

16000001609 is a deficient number, since it is larger than the sum of its proper divisors (1).

16000001609 is an equidigital number, since it uses as much as digits as its factorization.

16000001609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 324, while the sum is 23.

The spelling of 16000001609 in words is "sixteen billion, one thousand, six hundred nine".