135440542234379 has 2 divisors, whose sum is σ = 135440542234380. Its totient is φ = 135440542234378.

The previous prime is 135440542234357. The next prime is 135440542234433. The reversal of 135440542234379 is 973432245044531.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (973432245044531) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 135440542234379 - 2¹⁶ = 135440542168843 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (135440542234079) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67720271117189 + 67720271117190.

It is an arithmetic number, because the mean of its divisors is an integer number (67720271117190).

Almost surely, 2^{135440542234379} is an apocalyptic number.

135440542234379 is a deficient number, since it is larger than the sum of its proper divisors (1).

135440542234379 is an equidigital number, since it uses as much as digits as its factorization.

135440542234379 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 43545600, while the sum is 56.

The spelling of 135440542234379 in words is "one hundred thirty-five trillion, four hundred forty billion, five hundred forty-two million, two hundred thirty-four thousand, three hundred seventy-nine".