135787820573 has 2 divisors, whose sum is σ = 135787820574. Its totient is φ = 135787820572.

The previous prime is 135787820549. The next prime is 135787820579. The reversal of 135787820573 is 375028787531.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 78734676409 + 57053144164 = 280597^2 + 238858^2 .

It is a cyclic number.

It is not a de Polignac number, because 135787820573 - 2²⁰ = 135786771997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (135787820579) 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, 67893910286 + 67893910287.

It is an arithmetic number, because the mean of its divisors is an integer number (67893910287).

Almost surely, 2^135787820573 is an apocalyptic number.

It is an amenable number.

135787820573 is a deficient number, since it is larger than the sum of its proper divisors (1).

135787820573 is an equidigital number, since it uses as much as digits as its factorization.

135787820573 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9878400, while the sum is 56.

The spelling of 135787820573 in words is "one hundred thirty-five billion, seven hundred eighty-seven million, eight hundred twenty thousand, five hundred seventy-three".