16540012105 has 16 divisors (see below), whose sum is σ = 20608243200. Its totient is φ = 12728560320.

The previous prime is 16540012067. The next prime is 16540012117. The reversal of 16540012105 is 50121004561.

It is a happy number.

It is not a de Polignac number, because 16540012105 - 2¹³ = 16540003913 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 16540012105.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 171165 + ... + 249754.

It is an arithmetic number, because the mean of its divisors is an integer number (1288015200).

Almost surely, 2^16540012105 is an apocalyptic number.

It is an amenable number.

16540012105 is a deficient number, since it is larger than the sum of its proper divisors (4068231095).

16540012105 is a wasteful number, since it uses less digits than its factorization.

16540012105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 421224.

The product of its (nonzero) digits is 1200, while the sum is 25.

Adding to 16540012105 its reverse (50121004561), we get a palindrome (66661016666).

The spelling of 16540012105 in words is "sixteen billion, five hundred forty million, twelve thousand, one hundred five".