133564553566 has 16 divisors (see below), whose sum is σ = 206889637248. Its totient is φ = 64603008000.

The previous prime is 133564553561. The next prime is 133564553621. The reversal of 133564553566 is 665355465331.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133564553561) 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 7 ways as a sum of consecutive naturals, for example, 254635 + ... + 576166.

It is an arithmetic number, because the mean of its divisors is an integer number (12930602328).

Almost surely, 2^133564553566 is an apocalyptic number.

133564553566 is a deficient number, since it is larger than the sum of its proper divisors (73325083682).

133564553566 is a wasteful number, since it uses less digits than its factorization.

133564553566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 833427.

The product of its digits is 14580000, while the sum is 52.

The spelling of 133564553566 in words is "one hundred thirty-three billion, five hundred sixty-four million, five hundred fifty-three thousand, five hundred sixty-six".