135563281857 has 8 divisors (see below), whose sum is σ = 200834491680. Its totient is φ = 90375521220.

The previous prime is 135563281853. The next prime is 135563281873. The reversal of 135563281857 is 758182365531.

135563281857 is a `hidden beast` number, since 1 + 3 + 5 + 563 + 28 + 1 + 8 + 57 = 666.

It is not a de Polignac number, because 135563281857 - 2² = 135563281853 is a prime.

It is not an unprimeable number, because it can be changed into a prime (135563281853) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2510431119 + ... + 2510431172.

It is an arithmetic number, because the mean of its divisors is an integer number (25104311460).

Almost surely, 2^135563281857 is an apocalyptic number.

It is an amenable number.

135563281857 is a deficient number, since it is larger than the sum of its proper divisors (65271209823).

135563281857 is an equidigital number, since it uses as much as digits as its factorization.

135563281857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5020862300 (or 5020862294 counting only the distinct ones).

The product of its digits is 6048000, while the sum is 54.

The spelling of 135563281857 in words is "one hundred thirty-five billion, five hundred sixty-three million, two hundred eighty-one thousand, eight hundred fifty-seven".