64481133 has 16 divisors (see below), whose sum is σ = 88231680. Its totient is φ = 41868096.

The previous prime is 64481129. The next prime is 64481141. The reversal of 64481133 is 33118446.

It is not a de Polignac number, because 64481133 - 2² = 64481129 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 64481133.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64481033) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31291 + ... + 33287.

It is an arithmetic number, because the mean of its divisors is an integer number (5514480).

Almost surely, 2^64481133 is an apocalyptic number.

It is an amenable number.

64481133 is a deficient number, since it is larger than the sum of its proper divisors (23750547).

64481133 is a wasteful number, since it uses less digits than its factorization.

64481133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2276.

The product of its digits is 6912, while the sum is 30.

The square root of 64481133 is about 8030.0145080815. The cubic root of 64481133 is about 400.9998590390. Note that the first 3 decimals are identical.

Adding to 64481133 its reverse (33118446), we get a palindrome (97599579).

The spelling of 64481133 in words is "sixty-four million, four hundred eighty-one thousand, one hundred thirty-three".