12195919668 has 12 divisors (see below), whose sum is σ = 28457145920. Its totient is φ = 4065306552.

The previous prime is 12195919657. The next prime is 12195919679. The reversal of 12195919668 is 86691959121.

It is an interprime number because it is at equal distance from previous prime (12195919657) and next prime (12195919679).

It is a tau number, because it is divible by the number of its divisors (12).

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, 508163308 + ... + 508163331.

Almost surely, 2^12195919668 is an apocalyptic number.

It is an amenable number.

12195919668 is an abundant number, since it is smaller than the sum of its proper divisors (16261226252).

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

12195919668 is a wasteful number, since it uses less digits than its factorization.

12195919668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1016326646 (or 1016326644 counting only the distinct ones).

The product of its digits is 2099520, while the sum is 57.

The spelling of 12195919668 in words is "twelve billion, one hundred ninety-five million, nine hundred nineteen thousand, six hundred sixty-eight".