11811893749 has 8 divisors (see below), whose sum is σ = 12253248000. Its totient is φ = 11372809392.

The previous prime is 11811893741. The next prime is 11811893773. The reversal of 11811893749 is 94739811811.

It is a happy number.

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 11811893749 - 2³ = 11811893741 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11811893696 and 11811893705.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11811893741) 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, 556869 + ... + 577690.

It is an arithmetic number, because the mean of its divisors is an integer number (1531656000).

Almost surely, 2^11811893749 is an apocalyptic number.

It is an amenable number.

11811893749 is a deficient number, since it is larger than the sum of its proper divisors (441354251).

11811893749 is a wasteful number, since it uses less digits than its factorization.

11811893749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1134947.

The product of its digits is 435456, while the sum is 52.

The spelling of 11811893749 in words is "eleven billion, eight hundred eleven million, eight hundred ninety-three thousand, seven hundred forty-nine".