2173860812844 has 36 divisors (see below), whose sum is σ = 6280042348944. Its totient is φ = 621103089312.

The previous prime is 2173860812813. The next prime is 2173860812861. The reversal of 2173860812844 is 4482180683712.

2173860812844 is a `hidden beast` number, since 2 + 1 + 7 + 3 + 8 + 608 + 1 + 28 + 4 + 4 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

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 11 ways as a sum of consecutive naturals, for example, 4313215647 + ... + 4313216150.

It is an arithmetic number, because the mean of its divisors is an integer number (174445620804).

Almost surely, 2^{2173860812844} is an apocalyptic number.

It is an amenable number.

2173860812844 is an abundant number, since it is smaller than the sum of its proper divisors (4106181536100).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2173860812844 is a wasteful number, since it uses less digits than its factorization.

2173860812844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8626431814 (or 8626431809 counting only the distinct ones).

The product of its (nonzero) digits is 4128768, while the sum is 54.

The spelling of 2173860812844 in words is "two trillion, one hundred seventy-three billion, eight hundred sixty million, eight hundred twelve thousand, eight hundred forty-four".