135561555603 has 12 divisors (see below), whose sum is σ = 198493481160. Its totient is φ = 89136364896.

The previous prime is 135561555587. The next prime is 135561555607. The reversal of 135561555603 is 306555165531.

135561555603 is a `hidden beast` number, since 1 + 35 + 5 + 6 + 1 + 5 + 5 + 5 + 603 = 666.

It is not a de Polignac number, because 135561555603 - 2⁴ = 135561555587 is a prime.

It is not an unprimeable number, because it can be changed into a prime (135561555607) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 103166433 + ... + 103167746.

It is an arithmetic number, because the mean of its divisors is an integer number (16541123430).

Almost surely, 2^135561555603 is an apocalyptic number.

135561555603 is a deficient number, since it is larger than the sum of its proper divisors (62931925557).

135561555603 is a wasteful number, since it uses less digits than its factorization.

135561555603 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 206334258 (or 206334255 counting only the distinct ones).

The product of its (nonzero) digits is 1012500, while the sum is 45.

The spelling of 135561555603 in words is "one hundred thirty-five billion, five hundred sixty-one million, five hundred fifty-five thousand, six hundred three".