2122558806840 has 128 divisors (see below), whose sum is σ = 6415615756800. Its totient is φ = 561761164800.

The previous prime is 2122558806829. The next prime is 2122558806853. The reversal of 2122558806840 is 486088552212.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 20296606 + ... + 20400914.

It is an arithmetic number, because the mean of its divisors is an integer number (50121998100).

Almost surely, 2^{2122558806840} is an apocalyptic number.

2122558806840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2122558806840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3207807878400).

2122558806840 is an abundant number, since it is smaller than the sum of its proper divisors (4293056949960).

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

2122558806840 is a wasteful number, since it uses less digits than its factorization.

2122558806840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105597 (or 105593 counting only the distinct ones).

The product of its (nonzero) digits is 2457600, while the sum is 51.

The spelling of 2122558806840 in words is "two trillion, one hundred twenty-two billion, five hundred fifty-eight million, eight hundred six thousand, eight hundred forty".