135644609211 has 4 divisors (see below), whose sum is σ = 180859478952. Its totient is φ = 90429739472.

The previous prime is 135644609209. The next prime is 135644609213. The reversal of 135644609211 is 112906446531.

It is a happy number.

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

It is an interprime number because it is at equal distance from previous prime (135644609209) and next prime (135644609213).

It is a cyclic number.

It is not a de Polignac number, because 135644609211 - 2¹ = 135644609209 is a prime.

It is not an unprimeable number, because it can be changed into a prime (135644609213) 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, 22607434866 + ... + 22607434871.

It is an arithmetic number, because the mean of its divisors is an integer number (45214869738).

Almost surely, 2^135644609211 is an apocalyptic number.

135644609211 is a deficient number, since it is larger than the sum of its proper divisors (45214869741).

135644609211 is an equidigital number, since it uses as much as digits as its factorization.

135644609211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45214869740.

The product of its (nonzero) digits is 155520, while the sum is 42.

The spelling of 135644609211 in words is "one hundred thirty-five billion, six hundred forty-four million, six hundred nine thousand, two hundred eleven".