2191959804 has 36 divisors (see below), whose sum is σ = 5433136184. Its totient is φ = 687672576.

The previous prime is 2191959797. The next prime is 2191959817. The reversal of 2191959804 is 4089591912.

2191959804 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 312559 + ... + 319494.

Almost surely, 2^2191959804 is an apocalyptic number.

It is an amenable number.

2191959804 is an abundant number, since it is smaller than the sum of its proper divisors (3241176380).

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

2191959804 is a wasteful number, since it uses less digits than its factorization.

2191959804 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 632094 (or 632075 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 48.

The square root of 2191959804 is about 46818.3703689054. The cubic root of 2191959804 is about 1299.0051173171.

The spelling of 2191959804 in words is "two billion, one hundred ninety-one million, nine hundred fifty-nine thousand, eight hundred four".