11965609912 has 8 divisors (see below), whose sum is σ = 22435518600. Its totient is φ = 5982804952.

The previous prime is 11965609867. The next prime is 11965609933. The reversal of 11965609912 is 21990656911.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 747850612 + ... + 747850627.

It is an arithmetic number, because the mean of its divisors is an integer number (2804439825).

Almost surely, 2^11965609912 is an apocalyptic number.

It is an amenable number.

11965609912 is a deficient number, since it is larger than the sum of its proper divisors (10469908688).

11965609912 is a wasteful number, since it uses less digits than its factorization.

11965609912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1495701245 (or 1495701241 counting only the distinct ones).

The product of its (nonzero) digits is 262440, while the sum is 49.

The spelling of 11965609912 in words is "eleven billion, nine hundred sixty-five million, six hundred nine thousand, nine hundred twelve".