133616636 has 6 divisors (see below), whose sum is σ = 233829120. Its totient is φ = 66808316.

The previous prime is 133616633. The next prime is 133616641. The reversal of 133616636 is 636616331.

It is a junction number, because it is equal to n+sod(n) for n = 133616596 and 133616605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133616633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16702076 + ... + 16702083.

It is an arithmetic number, because the mean of its divisors is an integer number (38971520).

Almost surely, 2^133616636 is an apocalyptic number.

It is an amenable number.

133616636 is a deficient number, since it is larger than the sum of its proper divisors (100212484).

133616636 is a wasteful number, since it uses less digits than its factorization.

133616636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33404163 (or 33404161 counting only the distinct ones).

The product of its digits is 34992, while the sum is 35.

The square root of 133616636 is about 11559.2662396884. The cubic root of 133616636 is about 511.2345281393.

The spelling of 133616636 in words is "one hundred thirty-three million, six hundred sixteen thousand, six hundred thirty-six".