135137678891 has 2 divisors, whose sum is σ = 135137678892. Its totient is φ = 135137678890.

The previous prime is 135137678867. The next prime is 135137678933. The reversal of 135137678891 is 198876731531.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 135137678891 - 2¹⁰ = 135137677867 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 135137678891.

It is not a weakly prime, because it can be changed into another prime (135137678191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67568839445 + 67568839446.

It is an arithmetic number, because the mean of its divisors is an integer number (67568839446).

Almost surely, 2^135137678891 is an apocalyptic number.

135137678891 is a deficient number, since it is larger than the sum of its proper divisors (1).

135137678891 is an equidigital number, since it uses as much as digits as its factorization.

135137678891 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7620480, while the sum is 59.

The spelling of 135137678891 in words is "one hundred thirty-five billion, one hundred thirty-seven million, six hundred seventy-eight thousand, eight hundred ninety-one".