2105444815838 has 64 divisors (see below), whose sum is σ = 3965322157440. Its totient is φ = 816279939072.

The previous prime is 2105444815807. The next prime is 2105444815841. The reversal of 2105444815838 is 8385184445012.

It is a self number, because there is not a number n which added to its sum of digits gives 2105444815838.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1581218 + ... + 2590586.

It is an arithmetic number, because the mean of its divisors is an integer number (61958158710).

Almost surely, 2^{2105444815838} is an apocalyptic number.

2105444815838 is a deficient number, since it is larger than the sum of its proper divisors (1859877341602).

2105444815838 is a wasteful number, since it uses less digits than its factorization.

2105444815838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1009621.

The product of its (nonzero) digits is 4915200, while the sum is 53.

The spelling of 2105444815838 in words is "two trillion, one hundred five billion, four hundred forty-four million, eight hundred fifteen thousand, eight hundred thirty-eight".