135320215673 has 2 divisors, whose sum is σ = 135320215674. Its totient is φ = 135320215672.

The previous prime is 135320215531. The next prime is 135320215757. The reversal of 135320215673 is 376512023531.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 129453881209 + 5866334464 = 359797^2 + 76592^2 .

It is a cyclic number.

It is not a de Polignac number, because 135320215673 - 2¹⁸ = 135319953529 is a prime.

It is not a weakly prime, because it can be changed into another prime (135320212673) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67660107836 + 67660107837.

It is an arithmetic number, because the mean of its divisors is an integer number (67660107837).

Almost surely, 2^135320215673 is an apocalyptic number.

It is an amenable number.

135320215673 is a deficient number, since it is larger than the sum of its proper divisors (1).

135320215673 is an equidigital number, since it uses as much as digits as its factorization.

135320215673 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 113400, while the sum is 38.

The spelling of 135320215673 in words is "one hundred thirty-five billion, three hundred twenty million, two hundred fifteen thousand, six hundred seventy-three".