2191695396 has 48 divisors (see below), whose sum is σ = 5585448960. Its totient is φ = 663365920.

The previous prime is 2191695383. The next prime is 2191695421. The reversal of 2191695396 is 6935961912.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 107725 + ... + 126443.

It is an arithmetic number, because the mean of its divisors is an integer number (116363520).

Almost surely, 2^2191695396 is an apocalyptic number.

It is an amenable number.

2191695396 is an abundant number, since it is smaller than the sum of its proper divisors (3393753564).

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

2191695396 is a wasteful number, since it uses less digits than its factorization.

2191695396 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19624 (or 19622 counting only the distinct ones).

The product of its digits is 787320, while the sum is 51.

The square root of 2191695396 is about 46815.5465203601. The cubic root of 2191695396 is about 1298.9528838233.

The spelling of 2191695396 in words is "two billion, one hundred ninety-one million, six hundred ninety-five thousand, three hundred ninety-six".