135123775117 has 4 divisors (see below), whose sum is σ = 135201389596. Its totient is φ = 135046160640.

The previous prime is 135123775093. The next prime is 135123775147. The reversal of 135123775117 is 711577321531.

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 30239123236 + 104884651881 = 173894^2 + 323859^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-135123775117 is a prime.

It is a super-3 number, since 3×135123775117³ (a number of 34 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135123775147) 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, 38804628 + ... + 38808109.

It is an arithmetic number, because the mean of its divisors is an integer number (33800347399).

Almost surely, 2^135123775117 is an apocalyptic number.

It is an amenable number.

135123775117 is a deficient number, since it is larger than the sum of its proper divisors (77614479).

135123775117 is an equidigital number, since it uses as much as digits as its factorization.

135123775117 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77614478.

The product of its digits is 154350, while the sum is 43.

The spelling of 135123775117 in words is "one hundred thirty-five billion, one hundred twenty-three million, seven hundred seventy-five thousand, one hundred seventeen".