135544215523 has 4 divisors (see below), whose sum is σ = 135583701688. Its totient is φ = 135504729360.

The previous prime is 135544215511. The next prime is 135544215529. The reversal of 135544215523 is 325512445531.

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

It is a cyclic number.

It is not a de Polignac number, because 135544215523 - 2²⁹ = 135007344611 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (135544215529) 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, 19737933 + ... + 19744798.

It is an arithmetic number, because the mean of its divisors is an integer number (33895925422).

Almost surely, 2^135544215523 is an apocalyptic number.

135544215523 is a deficient number, since it is larger than the sum of its proper divisors (39486165).

135544215523 is an equidigital number, since it uses as much as digits as its factorization.

135544215523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39486164.

The product of its digits is 360000, while the sum is 40.

The spelling of 135544215523 in words is "one hundred thirty-five billion, five hundred forty-four million, two hundred fifteen thousand, five hundred twenty-three".