135644529 has 4 divisors (see below), whose sum is σ = 180859376. Its totient is φ = 90429684.

The previous prime is 135644527. The next prime is 135644549. The reversal of 135644529 is 925446531.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 135644529 - 2¹ = 135644527 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (135644521) 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, 22607419 + ... + 22607424.

It is an arithmetic number, because the mean of its divisors is an integer number (45214844).

Almost surely, 2^135644529 is an apocalyptic number.

It is an amenable number.

135644529 is a deficient number, since it is larger than the sum of its proper divisors (45214847).

135644529 is an equidigital number, since it uses as much as digits as its factorization.

135644529 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45214846.

The product of its digits is 129600, while the sum is 39.

The square root of 135644529 is about 11646.6531243959. The cubic root of 135644529 is about 513.8078801241.

The spelling of 135644529 in words is "one hundred thirty-five million, six hundred forty-four thousand, five hundred twenty-nine".