16838178505105 has 4 divisors (see below), whose sum is σ = 20205814206132. Its totient is φ = 13470542804080.

The previous prime is 16838178505067. The next prime is 16838178505153. The reversal of 16838178505105 is 50150587183861.

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 8020580835969 + 8817597669136 = 2832063^2 + 2969444^2 .

It is not a de Polignac number, because 16838178505105 - 2²⁵ = 16838144950673 is a prime.

It is a super-2 number, since 2×16838178505105² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 16838178505105.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1683817850506 + ... + 1683817850515.

It is an arithmetic number, because the mean of its divisors is an integer number (5051453551533).

Almost surely, 2^{16838178505105} is an apocalyptic number.

It is an amenable number.

16838178505105 is a deficient number, since it is larger than the sum of its proper divisors (3367635701027).

16838178505105 is an equidigital number, since it uses as much as digits as its factorization.

16838178505105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3367635701026.

The product of its (nonzero) digits is 8064000, while the sum is 58.

The spelling of 16838178505105 in words is "sixteen trillion, eight hundred thirty-eight billion, one hundred seventy-eight million, five hundred five thousand, one hundred five".