135656664604423 has 2 divisors, whose sum is σ = 135656664604424. Its totient is φ = 135656664604422.

The previous prime is 135656664604333. The next prime is 135656664604477. The reversal of 135656664604423 is 324406466656531.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 135656664604423 - 2³⁷ = 135519225650951 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (135656664604723) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67828332302211 + 67828332302212.

It is an arithmetic number, because the mean of its divisors is an integer number (67828332302212).

Almost surely, 2^{135656664604423} is an apocalyptic number.

135656664604423 is a deficient number, since it is larger than the sum of its proper divisors (1).

135656664604423 is an equidigital number, since it uses as much as digits as its factorization.

135656664604423 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 223948800, while the sum is 61.

The spelling of 135656664604423 in words is "one hundred thirty-five trillion, six hundred fifty-six billion, six hundred sixty-four million, six hundred four thousand, four hundred twenty-three".