2118861245886 has 192 divisors, whose sum is σ = 5391111290880. Its totient is φ = 543397377600.

The previous prime is 2118861245843. The next prime is 2118861245983. The reversal of 2118861245886 is 6885421688112.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 136174575 + ... + 136190133.

It is an arithmetic number, because the mean of its divisors is an integer number (28078704640).

Almost surely, 2^{2118861245886} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2118861245886, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2695555645440).

2118861245886 is an abundant number, since it is smaller than the sum of its proper divisors (3272250044994).

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

2118861245886 is a wasteful number, since it uses less digits than its factorization.

2118861245886 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15931 (or 15920 counting only the distinct ones).

The product of its digits is 11796480, while the sum is 60.

The spelling of 2118861245886 in words is "two trillion, one hundred eighteen billion, eight hundred sixty-one million, two hundred forty-five thousand, eight hundred eighty-six".