135145234666523 has 4 divisors (see below), whose sum is σ = 135145546508688. Its totient is φ = 135144922824360.

The previous prime is 135145234666469. The next prime is 135145234666639. The reversal of 135145234666523 is 325666432541531.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-135145234666523 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (135145234666223) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 155270111 + ... + 156138072.

It is an arithmetic number, because the mean of its divisors is an integer number (33786386627172).

Almost surely, 2^{135145234666523} is an apocalyptic number.

135145234666523 is a deficient number, since it is larger than the sum of its proper divisors (311842165).

135145234666523 is an equidigital number, since it uses as much as digits as its factorization.

135145234666523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 311842164.

The product of its digits is 46656000, while the sum is 56.

The spelling of 135145234666523 in words is "one hundred thirty-five trillion, one hundred forty-five billion, two hundred thirty-four million, six hundred sixty-six thousand, five hundred twenty-three".