16538200091 has 4 divisors (see below), whose sum is σ = 18900800112. Its totient is φ = 14175600072.

The previous prime is 16538200043. The next prime is 16538200111. The reversal of 16538200091 is 19000283561.

16538200091 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 16538200091 - 2⁶ = 16538200027 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16538200291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1181300000 + ... + 1181300013.

It is an arithmetic number, because the mean of its divisors is an integer number (4725200028).

Almost surely, 2^16538200091 is an apocalyptic number.

16538200091 is a deficient number, since it is larger than the sum of its proper divisors (2362600021).

16538200091 is an equidigital number, since it uses as much as digits as its factorization.

16538200091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2362600020.

The product of its (nonzero) digits is 12960, while the sum is 35.

The spelling of 16538200091 in words is "sixteen billion, five hundred thirty-eight million, two hundred thousand, ninety-one".