135235665503 has 4 divisors (see below), whose sum is σ = 137452643688. Its totient is φ = 133018687320.

The previous prime is 135235665491. The next prime is 135235665529. The reversal of 135235665503 is 305566532531.

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 135235665503 - 2⁸ = 135235665247 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135235665553) 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, 1108489001 + ... + 1108489122.

It is an arithmetic number, because the mean of its divisors is an integer number (34363160922).

Almost surely, 2^135235665503 is an apocalyptic number.

135235665503 is a deficient number, since it is larger than the sum of its proper divisors (2216978185).

135235665503 is an equidigital number, since it uses as much as digits as its factorization.

135235665503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2216978184.

The product of its (nonzero) digits is 1215000, while the sum is 44.

The spelling of 135235665503 in words is "one hundred thirty-five billion, two hundred thirty-five million, six hundred sixty-five thousand, five hundred three".