12568781511 has 48 divisors (see below), whose sum is σ = 22064384160. Its totient is φ = 6789000960.

The previous prime is 12568781483. The next prime is 12568781551. The reversal of 12568781511 is 11518786521.

12568781511 is a `hidden beast` number, since 1 + 2 + 5 + 68 + 78 + 1 + 511 = 666.

12568781511 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12568781511 - 2¹¹ = 12568779463 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12568781551) by changing a digit.

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 47 ways as a sum of consecutive naturals, for example, 131056 + ... + 205701.

It is an arithmetic number, because the mean of its divisors is an integer number (459674670).

Almost surely, 2^12568781511 is an apocalyptic number.

12568781511 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

12568781511 is a deficient number, since it is larger than the sum of its proper divisors (9495602649).

12568781511 is a wasteful number, since it uses less digits than its factorization.

12568781511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 336816 (or 336813 counting only the distinct ones).

The product of its digits is 134400, while the sum is 45.

The spelling of 12568781511 in words is "twelve billion, five hundred sixty-eight million, seven hundred eighty-one thousand, five hundred eleven".