135166355778 has 32 divisors (see below), whose sum is σ = 276927989760. Its totient is φ = 43967871360.

The previous prime is 135166355773. The next prime is 135166355783. The reversal of 135166355778 is 877553661531.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (135166355773) and next prime (135166355783).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (135166355773) 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 15 ways as a sum of consecutive naturals, for example, 1407483 + ... + 1500446.

It is an arithmetic number, because the mean of its divisors is an integer number (8653999680).

Almost surely, 2^135166355778 is an apocalyptic number.

135166355778 is an abundant number, since it is smaller than the sum of its proper divisors (141761633982).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

135166355778 is a wasteful number, since it uses less digits than its factorization.

135166355778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2908122.

The product of its digits is 15876000, while the sum is 57.

The spelling of 135166355778 in words is "one hundred thirty-five billion, one hundred sixty-six million, three hundred fifty-five thousand, seven hundred seventy-eight".