135344221633 has 4 divisors (see below), whose sum is σ = 135345779140. Its totient is φ = 135342664128.

The previous prime is 135344221601. The next prime is 135344221643. The reversal of 135344221633 is 336122443531.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 56800235584 + 78543986049 = 238328^2 + 280257^2 .

It is a cyclic number.

It is not a de Polignac number, because 135344221633 - 2⁵ = 135344221601 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 135344221592 and 135344221601.

It is not an unprimeable number, because it can be changed into a prime (135344221643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 640188 + ... + 824941.

It is an arithmetic number, because the mean of its divisors is an integer number (33836444785).

Almost surely, 2^135344221633 is an apocalyptic number.

It is an amenable number.

135344221633 is a deficient number, since it is larger than the sum of its proper divisors (1557507).

135344221633 is an equidigital number, since it uses as much as digits as its factorization.

135344221633 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1557506.

The product of its digits is 155520, while the sum is 37.

The spelling of 135344221633 in words is "one hundred thirty-five billion, three hundred forty-four million, two hundred twenty-one thousand, six hundred thirty-three".