133686464 has 28 divisors (see below), whose sum is σ = 265697208. Its totient is φ = 66739200.

The previous prime is 133686461. The next prime is 133686479. The reversal of 133686464 is 464686331.

It is not an unprimeable number, because it can be changed into a prime (133686461) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55199 + ... + 57569.

It is an arithmetic number, because the mean of its divisors is an integer number (9489186).

Almost surely, 2^133686464 is an apocalyptic number.

It is an amenable number.

133686464 is a deficient number, since it is larger than the sum of its proper divisors (132010744).

133686464 is an equidigital number, since it uses as much as digits as its factorization.

133686464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3264 (or 3254 counting only the distinct ones).

The product of its digits is 248832, while the sum is 41.

The square root of 133686464 is about 11562.2862791059. The cubic root of 133686464 is about 511.3235696161.

The spelling of 133686464 in words is "one hundred thirty-three million, six hundred eighty-six thousand, four hundred sixty-four".