135643563 has 36 divisors (see below), whose sum is σ = 218262408. Its totient is φ = 80490240.

The previous prime is 135643559. The next prime is 135643597. The reversal of 135643563 is 365346531.

135643563 is a `hidden beast` number, since 1 + 3 + 5 + 643 + 5 + 6 + 3 = 666.

It is not a de Polignac number, because 135643563 - 2² = 135643559 is a prime.

It is not an unprimeable number, because it can be changed into a prime (135643523) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 990031 + ... + 990167.

Almost surely, 2^135643563 is an apocalyptic number.

135643563 is a deficient number, since it is larger than the sum of its proper divisors (82618845).

135643563 is a wasteful number, since it uses less digits than its factorization.

135643563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 364 (or 224 counting only the distinct ones).

The product of its digits is 97200, while the sum is 36.

The square root of 135643563 is about 11646.6116531805. The cubic root of 135643563 is about 513.8066604175.

The spelling of 135643563 in words is "one hundred thirty-five million, six hundred forty-three thousand, five hundred sixty-three".