16444370069 has 2 divisors, whose sum is σ = 16444370070. Its totient is φ = 16444370068.

The previous prime is 16444370051. The next prime is 16444370101. The reversal of 16444370069 is 96007344461.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16131540100 + 312829969 = 127010^2 + 17687^2 .

It is a cyclic number.

It is not a de Polignac number, because 16444370069 - 2²⁰ = 16443321493 is a prime.

It is a super-2 number, since 2×16444370069² (a number of 21 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16444370869) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8222185034 + 8222185035.

It is an arithmetic number, because the mean of its divisors is an integer number (8222185035).

Almost surely, 2^16444370069 is an apocalyptic number.

It is an amenable number.

16444370069 is a deficient number, since it is larger than the sum of its proper divisors (1).

16444370069 is an equidigital number, since it uses as much as digits as its factorization.

16444370069 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 435456, while the sum is 44.

The spelling of 16444370069 in words is "sixteen billion, four hundred forty-four million, three hundred seventy thousand, sixty-nine".