16008115549 has 4 divisors (see below), whose sum is σ = 16029661536. Its totient is φ = 15986569564.

The previous prime is 16008115537. The next prime is 16008115573. The reversal of 16008115549 is 94551180061.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 94551180061 = 13 ⋅7273167697.

It is a cyclic number.

It is not a de Polignac number, because 16008115549 - 2⁵ = 16008115517 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16008115589) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10771879 + ... + 10773364.

It is an arithmetic number, because the mean of its divisors is an integer number (4007415384).

Almost surely, 2^16008115549 is an apocalyptic number.

It is an amenable number.

16008115549 is a deficient number, since it is larger than the sum of its proper divisors (21545987).

16008115549 is an equidigital number, since it uses as much as digits as its factorization.

16008115549 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21545986.

The product of its (nonzero) digits is 43200, while the sum is 40.

The spelling of 16008115549 in words is "sixteen billion, eight million, one hundred fifteen thousand, five hundred forty-nine".