16380206009 has 4 divisors (see below), whose sum is σ = 16386918900. Its totient is φ = 16373493120.

The previous prime is 16380205949. The next prime is 16380206021. The reversal of 16380206009 is 90060208361.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 90060208361 = 251 ⋅358805611.

It can be written as a sum of positive squares in 2 ways, for example, as 9707766784 + 6672439225 = 98528^2 + 81685^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16380206009 is a prime.

It is a super-2 number, since 2×16380206009² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 16380206009.

It is not an unprimeable number, because it can be changed into a prime (16380206209) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3352784 + ... + 3357665.

It is an arithmetic number, because the mean of its divisors is an integer number (4096729725).

Almost surely, 2^16380206009 is an apocalyptic number.

It is an amenable number.

16380206009 is a deficient number, since it is larger than the sum of its proper divisors (6712891).

16380206009 is an equidigital number, since it uses as much as digits as its factorization.

16380206009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6712890.

The product of its (nonzero) digits is 15552, while the sum is 35.

The spelling of 16380206009 in words is "sixteen billion, three hundred eighty million, two hundred six thousand, nine".