1144664064 has 78 divisors (see below), whose sum is σ = 3306510116. Its totient is φ = 381542400.

The previous prime is 1144664051. The next prime is 1144664089. The reversal of 1144664064 is 4604664411.

1144664064 is a `hidden beast` number, since 1 + 1 + 4 + 4 + 6 + 640 + 6 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 21339 + ... + 52389.

Almost surely, 2^1144664064 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1144664064, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1653255058).

1144664064 is an abundant number, since it is smaller than the sum of its proper divisors (2161846052).

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

1144664064 is an equidigital number, since it uses as much as digits as its factorization.

1144664064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31081 (or 31056 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 36.

The square root of 1144664064 is about 33832.8843582690. The cubic root of 1144664064 is about 1046.0666334182.

The spelling of 1144664064 in words is "one billion, one hundred forty-four million, six hundred sixty-four thousand, sixty-four".