11961630668 has 24 divisors (see below), whose sum is σ = 22547057568. Its totient is φ = 5519776896.

The previous prime is 11961630619. The next prime is 11961630689. The reversal of 11961630668 is 86603616911.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 336305 + ... + 370167.

It is an arithmetic number, because the mean of its divisors is an integer number (939460732).

Almost surely, 2^11961630668 is an apocalyptic number.

It is an amenable number.

11961630668 is a deficient number, since it is larger than the sum of its proper divisors (10585426900).

11961630668 is a wasteful number, since it uses less digits than its factorization.

11961630668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40673 (or 40671 counting only the distinct ones).

The product of its (nonzero) digits is 279936, while the sum is 47.

The spelling of 11961630668 in words is "eleven billion, nine hundred sixty-one million, six hundred thirty thousand, six hundred sixty-eight".