2091479438880 has 384 divisors, whose sum is σ = 7889933399040. Its totient is φ = 514390487040.

The previous prime is 2091479438849. The next prime is 2091479438959. The reversal of 2091479438880 is 888349741902.

2091479438880 is a `hidden beast` number, since 2 + 0 + 9 + 1 + 479 + 4 + 3 + 88 + 80 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 69117834 + ... + 69148086.

It is an arithmetic number, because the mean of its divisors is an integer number (20546701560).

Almost surely, 2^{2091479438880} is an apocalyptic number.

2091479438880 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 2091479438880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3944966699520).

2091479438880 is an abundant number, since it is smaller than the sum of its proper divisors (5798453960160).

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

2091479438880 is a wasteful number, since it uses less digits than its factorization.

2091479438880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31521 (or 31507 counting only the distinct ones).

The product of its (nonzero) digits is 27869184, while the sum is 63.

The spelling of 2091479438880 in words is "two trillion, ninety-one billion, four hundred seventy-nine million, four hundred thirty-eight thousand, eight hundred eighty".