2108384054785 has 4 divisors (see below), whose sum is σ = 2530060865748. Its totient is φ = 1686707243824.

The previous prime is 2108384054783. The next prime is 2108384054801. The reversal of 2108384054785 is 5874504838012.

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 1337240144881 + 771143909904 = 1156391^2 + 878148^2 .

It is a cyclic number.

It is not a de Polignac number, because 2108384054785 - 2¹ = 2108384054783 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2108384054783) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 210838405474 + ... + 210838405483.

It is an arithmetic number, because the mean of its divisors is an integer number (632515216437).

Almost surely, 2^{2108384054785} is an apocalyptic number.

It is an amenable number.

2108384054785 is a deficient number, since it is larger than the sum of its proper divisors (421676810963).

2108384054785 is an equidigital number, since it uses as much as digits as its factorization.

2108384054785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 421676810962.

The product of its (nonzero) digits is 8601600, while the sum is 55.

The spelling of 2108384054785 in words is "two trillion, one hundred eight billion, three hundred eighty-four million, fifty-four thousand, seven hundred eighty-five".