2391994043208 has 384 divisors, whose sum is σ = 8387432202240. Its totient is φ = 597647808000.

The previous prime is 2391994043071. The next prime is 2391994043261. The reversal of 2391994043208 is 8023404991932.

2391994043208 is a `hidden beast` number, since 2 + 391 + 9 + 9 + 4 + 0 + 43 + 208 = 666.

2391994043208 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 28659618 + ... + 28742958.

It is an arithmetic number, because the mean of its divisors is an integer number (21842271360).

Almost surely, 2^{2391994043208} is an apocalyptic number.

2391994043208 is a gapful number since it is divisible by the number (28) 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 2391994043208, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4193716101120).

2391994043208 is an abundant number, since it is smaller than the sum of its proper divisors (5995438159032).

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

2391994043208 is a wasteful number, since it uses less digits than its factorization.

2391994043208 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83569 (or 83562 counting only the distinct ones).

The product of its (nonzero) digits is 3359232, while the sum is 54.

The spelling of 2391994043208 in words is "two trillion, three hundred ninety-one billion, nine hundred ninety-four million, forty-three thousand, two hundred eight".