6440133312 has 56 divisors (see below), whose sum is σ = 18932804400. Its totient is φ = 2146710528.

The previous prime is 6440133283. The next prime is 6440133317. The reversal of 6440133312 is 2133310446.

6440133312 is a `hidden beast` number, since 644 + 0 + 1 + 3 + 3 + 3 + 12 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (6440133317) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1861737 + ... + 1865192.

Almost surely, 2^6440133312 is an apocalyptic number.

It is an amenable number.

6440133312 is an abundant number, since it is smaller than the sum of its proper divisors (12492671088).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6440133312 is a wasteful number, since it uses less digits than its factorization.

6440133312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3726950 (or 3726934 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 27.

The square root of 6440133312 is about 80250.4411950489. The cubic root of 6440133312 is about 1860.5083314056.

Adding to 6440133312 its reverse (2133310446), we get a palindrome (8573443758).

The spelling of 6440133312 in words is "six billion, four hundred forty million, one hundred thirty-three thousand, three hundred twelve".