11691942088 has 8 divisors (see below), whose sum is σ = 21922391430. Its totient is φ = 5845971040.

The previous prime is 11691942077. The next prime is 11691942121. The reversal of 11691942088 is 88024919611.

It can be written as a sum of positive squares in only one way, i.e., 6625634404 + 5066307684 = 81398^2 + 71178^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 730746373 + ... + 730746388.

Almost surely, 2^11691942088 is an apocalyptic number.

It is an amenable number.

11691942088 is a deficient number, since it is larger than the sum of its proper divisors (10230449342).

11691942088 is a wasteful number, since it uses less digits than its factorization.

11691942088 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1461492767 (or 1461492763 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 49.

The spelling of 11691942088 in words is "eleven billion, six hundred ninety-one million, nine hundred forty-two thousand, eighty-eight".