135505721275 has 12 divisors (see below), whose sum is σ = 169514063352. Its totient is φ = 107445242240.

The previous prime is 135505721191. The next prime is 135505721293. The reversal of 135505721275 is 572127505531.

It is not a de Polignac number, because 135505721275 - 2³⁵ = 101145982907 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 23980489 + ... + 23986138.

It is an arithmetic number, because the mean of its divisors is an integer number (14126171946).

Almost surely, 2^135505721275 is an apocalyptic number.

135505721275 is a deficient number, since it is larger than the sum of its proper divisors (34008342077).

135505721275 is a wasteful number, since it uses less digits than its factorization.

135505721275 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47966750 (or 47966745 counting only the distinct ones).

The product of its (nonzero) digits is 367500, while the sum is 43.

The spelling of 135505721275 in words is "one hundred thirty-five billion, five hundred five million, seven hundred twenty-one thousand, two hundred seventy-five".