11978261129 has 2 divisors, whose sum is σ = 11978261130. Its totient is φ = 11978261128.

The previous prime is 11978261111. The next prime is 11978261153. The reversal of 11978261129 is 92116287911.

11978261129 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6740410000 + 5237851129 = 82100^2 + 72373^2 .

It is a cyclic number.

It is not a de Polignac number, because 11978261129 - 2¹² = 11978257033 is a prime.

It is not a weakly prime, because it can be changed into another prime (11978261189) 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 as a sum of consecutive naturals, namely, 5989130564 + 5989130565.

It is an arithmetic number, because the mean of its divisors is an integer number (5989130565).

Almost surely, 2^11978261129 is an apocalyptic number.

It is an amenable number.

11978261129 is a deficient number, since it is larger than the sum of its proper divisors (1).

11978261129 is an equidigital number, since it uses as much as digits as its factorization.

11978261129 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 108864, while the sum is 47.

The spelling of 11978261129 in words is "eleven billion, nine hundred seventy-eight million, two hundred sixty-one thousand, one hundred twenty-nine".