2261981684 has 12 divisors (see below), whose sum is σ = 3963060864. Its totient is φ = 1129678584.

The previous prime is 2261981671. The next prime is 2261981693. The reversal of 2261981684 is 4861891622.

2261981684 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×2261981684² = 10233122277502951712, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 324182 + ... + 331085.

It is an arithmetic number, because the mean of its divisors is an integer number (330255072).

Almost surely, 2^2261981684 is an apocalyptic number.

It is an amenable number.

2261981684 is a deficient number, since it is larger than the sum of its proper divisors (1701079180).

2261981684 is a wasteful number, since it uses less digits than its factorization.

2261981684 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 656134 (or 656132 counting only the distinct ones).

The product of its digits is 331776, while the sum is 47.

The square root of 2261981684 is about 47560.2952471912. The cubic root of 2261981684 is about 1312.6925727296.

The spelling of 2261981684 in words is "two billion, two hundred sixty-one million, nine hundred eighty-one thousand, six hundred eighty-four".