2181076992 has 144 divisors (see below), whose sum is σ = 6338372040. Its totient is φ = 722534400.

The previous prime is 2181076949. The next prime is 2181077009. The reversal of 2181076992 is 2996701812.

It is a tau number, because it is divible by the number of its divisors (144).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4441867 + ... + 4442357.

Almost surely, 2^2181076992 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2181076992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3169186020).

2181076992 is an abundant number, since it is smaller than the sum of its proper divisors (4157295048).

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

2181076992 is a wasteful number, since it uses less digits than its factorization.

2181076992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 760 (or 737 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 45.

The square root of 2181076992 is about 46702.0020127617. The cubic root of 2181076992 is about 1296.8517491952.

The spelling of 2181076992 in words is "two billion, one hundred eighty-one million, seventy-six thousand, nine hundred ninety-two".