133563656 has 8 divisors (see below), whose sum is σ = 250431870. Its totient is φ = 66781824.

The previous prime is 133563653. The next prime is 133563697. The reversal of 133563656 is 656365331.

It can be written as a sum of positive squares in only one way, i.e., 94750756 + 38812900 = 9734^2 + 6230^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (133563653) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8347721 + ... + 8347736.

Almost surely, 2^133563656 is an apocalyptic number.

It is an amenable number.

133563656 is a deficient number, since it is larger than the sum of its proper divisors (116868214).

133563656 is a wasteful number, since it uses less digits than its factorization.

133563656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16695463 (or 16695459 counting only the distinct ones).

The product of its digits is 145800, while the sum is 38.

The square root of 133563656 is about 11556.9743445246. The cubic root of 133563656 is about 511.1669497630.

The spelling of 133563656 in words is "one hundred thirty-three million, five hundred sixty-three thousand, six hundred fifty-six".