64381633 has 8 divisors (see below), whose sum is σ = 67932000. Its totient is φ = 60847488.

The previous prime is 64381627. The next prime is 64381649. The reversal of 64381633 is 33618346.

64381633 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64381633 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64381033) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4593 + ... + 12241.

It is an arithmetic number, because the mean of its divisors is an integer number (8491500).

Almost surely, 2^64381633 is an apocalyptic number.

It is an amenable number.

64381633 is a deficient number, since it is larger than the sum of its proper divisors (3550367).

64381633 is a wasteful number, since it uses less digits than its factorization.

64381633 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8111.

The product of its digits is 31104, while the sum is 34.

The square root of 64381633 is about 8023.8166105663. The cubic root of 64381633 is about 400.7934936288.

Adding to 64381633 its reverse (33618346), we get a palindrome (97999979).

The spelling of 64381633 in words is "sixty-four million, three hundred eighty-one thousand, six hundred thirty-three".