16380021169 has 4 divisors (see below), whose sum is σ = 17343551844. Its totient is φ = 15416490496.

The previous prime is 16380021121. The next prime is 16380021173. The reversal of 16380021169 is 96112008361.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5634003600 + 10746017569 = 75060^2 + 103663^2 .

It is a cyclic number.

It is not a de Polignac number, because 16380021169 - 2¹¹ = 16380019121 is a prime.

It is a super-3 number, since 3×16380021169³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (16380021179) 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, 481765312 + ... + 481765345.

It is an arithmetic number, because the mean of its divisors is an integer number (4335887961).

Almost surely, 2^16380021169 is an apocalyptic number.

It is an amenable number.

16380021169 is a deficient number, since it is larger than the sum of its proper divisors (963530675).

16380021169 is an equidigital number, since it uses as much as digits as its factorization.

16380021169 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 963530674.

The product of its (nonzero) digits is 15552, while the sum is 37.

The spelling of 16380021169 in words is "sixteen billion, three hundred eighty million, twenty-one thousand, one hundred sixty-nine".