12755827991 has 16 divisors (see below), whose sum is σ = 14111423424. Its totient is φ = 11468818944.

The previous prime is 12755827967. The next prime is 12755828017. The reversal of 12755827991 is 19972855721.

It is a cyclic number.

It is not a de Polignac number, because 12755827991 - 2⁶ = 12755827927 is a prime.

It is a super-2 number, since 2×12755827991² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12755827291) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 291161 + ... + 332093.

It is an arithmetic number, because the mean of its divisors is an integer number (881963964).

Almost surely, 2^12755827991 is an apocalyptic number.

12755827991 is a deficient number, since it is larger than the sum of its proper divisors (1355595433).

12755827991 is a wasteful number, since it uses less digits than its factorization.

12755827991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41770.

The product of its digits is 3175200, while the sum is 56.

The spelling of 12755827991 in words is "twelve billion, seven hundred fifty-five million, eight hundred twenty-seven thousand, nine hundred ninety-one".