135954634609 has 4 divisors (see below), whose sum is σ = 136162835316. Its totient is φ = 135746433904.

The previous prime is 135954634523. The next prime is 135954634657. The reversal of 135954634609 is 906436459531.

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 25640976384 + 110313658225 = 160128^2 + 332135^2 .

It is a cyclic number.

It is not a de Polignac number, because 135954634609 - 2⁷ = 135954634481 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 135954634609.

It is not an unprimeable number, because it can be changed into a prime (135954638609) 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, 104099374 + ... + 104100679.

It is an arithmetic number, because the mean of its divisors is an integer number (34040708829).

Almost surely, 2^135954634609 is an apocalyptic number.

It is an amenable number.

135954634609 is a deficient number, since it is larger than the sum of its proper divisors (208200707).

135954634609 is an equidigital number, since it uses as much as digits as its factorization.

135954634609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 208200706.

The product of its (nonzero) digits is 10497600, while the sum is 55.

The spelling of 135954634609 in words is "one hundred thirty-five billion, nine hundred fifty-four million, six hundred thirty-four thousand, six hundred nine".