133656464 has 10 divisors (see below), whose sum is σ = 258959430. Its totient is φ = 66828224.

The previous prime is 133656463. The next prime is 133656487. The reversal of 133656464 is 464656331.

It can be written as a sum of positive squares in only one way, i.e., 108576400 + 25080064 = 10420^2 + 5008^2 .

It is not an unprimeable number, because it can be changed into a prime (133656463) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4176749 + ... + 4176780.

It is an arithmetic number, because the mean of its divisors is an integer number (25895943).

Almost surely, 2^133656464 is an apocalyptic number.

It is an amenable number.

133656464 is a deficient number, since it is larger than the sum of its proper divisors (125302966).

133656464 is an equidigital number, since it uses as much as digits as its factorization.

133656464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8353537 (or 8353531 counting only the distinct ones).

The product of its digits is 155520, while the sum is 38.

The square root of 133656464 is about 11560.9888850392. The cubic root of 133656464 is about 511.2853187860.

The spelling of 133656464 in words is "one hundred thirty-three million, six hundred fifty-six thousand, four hundred sixty-four".