2196619812 has 36 divisors (see below), whose sum is σ = 5554030300. Its totient is φ = 732013632.

The previous prime is 2196619787. The next prime is 2196619823. The reversal of 2196619812 is 2189166912.

2196619812 is a `hidden beast` number, since 2 + 19 + 6 + 619 + 8 + 12 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1625218596 + 571401216 = 40314^2 + 23904^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 215814 + ... + 225762.

Almost surely, 2^2196619812 is an apocalyptic number.

It is an amenable number.

2196619812 is an abundant number, since it is smaller than the sum of its proper divisors (3357410488).

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

2196619812 is a wasteful number, since it uses less digits than its factorization.

2196619812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16092 (or 16087 counting only the distinct ones).

The product of its digits is 93312, while the sum is 45.

The square root of 2196619812 is about 46868.1108217517. The cubic root of 2196619812 is about 1299.9250079029.

Subtracting from 2196619812 its reverse (2189166912), we obtain a square (7452900 = 2730²).

The spelling of 2196619812 in words is "two billion, one hundred ninety-six million, six hundred nineteen thousand, eight hundred twelve".