133645653 has 16 divisors (see below), whose sum is σ = 209640960. Its totient is φ = 83855808.

The previous prime is 133645651. The next prime is 133645657. The reversal of 133645653 is 356546331.

133645653 is a `hidden beast` number, since 1 + 3 + 3 + 645 + 6 + 5 + 3 = 666.

It is not a de Polignac number, because 133645653 - 2¹ = 133645651 is a prime.

It is a super-2 number, since 2×133645653² = 35722321131592818, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133645651) 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 15 ways as a sum of consecutive naturals, for example, 145125 + ... + 146042.

It is an arithmetic number, because the mean of its divisors is an integer number (13102560).

Almost surely, 2^133645653 is an apocalyptic number.

It is an amenable number.

133645653 is a deficient number, since it is larger than the sum of its proper divisors (75995307).

133645653 is a wasteful number, since it uses less digits than its factorization.

133645653 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 291193 (or 291187 counting only the distinct ones).

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

The square root of 133645653 is about 11560.5213117748. The cubic root of 133645653 is about 511.2715330589.

The spelling of 133645653 in words is "one hundred thirty-three million, six hundred forty-five thousand, six hundred fifty-three".