12991183895 has 8 divisors (see below), whose sum is σ = 15658097904. Its totient is φ = 10347162304.

The previous prime is 12991183867. The next prime is 12991183921. The reversal of 12991183895 is 59838119921.

12991183895 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12991183895 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12991183895.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5721854 + ... + 5724123.

It is an arithmetic number, because the mean of its divisors is an integer number (1957262238).

Almost surely, 2^12991183895 is an apocalyptic number.

12991183895 is a deficient number, since it is larger than the sum of its proper divisors (2666914009).

12991183895 is a wasteful number, since it uses less digits than its factorization.

12991183895 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11446209.

The product of its digits is 1399680, while the sum is 56.

The spelling of 12991183895 in words is "twelve billion, nine hundred ninety-one million, one hundred eighty-three thousand, eight hundred ninety-five".