11991041693 has 8 divisors (see below), whose sum is σ = 12140567040. Its totient is φ = 11842420320.

The previous prime is 11991041641. The next prime is 11991041717. The reversal of 11991041693 is 39614019911.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11991041693 - 2²⁶ = 11923932829 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11991040693) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 199280 + ... + 252377.

It is an arithmetic number, because the mean of its divisors is an integer number (1517570880).

Almost surely, 2^11991041693 is an apocalyptic number.

It is an amenable number.

11991041693 is a deficient number, since it is larger than the sum of its proper divisors (149525347).

11991041693 is a wasteful number, since it uses less digits than its factorization.

11991041693 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 451987.

The product of its (nonzero) digits is 52488, while the sum is 44.

The spelling of 11991041693 in words is "eleven billion, nine hundred ninety-one million, forty-one thousand, six hundred ninety-three".