1144664635 has 8 divisors (see below), whose sum is σ = 1373791536. Its totient is φ = 915602400.

The previous prime is 1144664623. The next prime is 1144664639. The reversal of 1144664635 is 5364664411.

It is a happy number.

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

It is not a de Polignac number, because 1144664635 - 2⁵ = 1144664603 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1144664639) 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, 41460 + ... + 63310.

It is an arithmetic number, because the mean of its divisors is an integer number (171723942).

Almost surely, 2^1144664635 is an apocalyptic number.

1144664635 is a deficient number, since it is larger than the sum of its proper divisors (229126901).

1144664635 is a wasteful number, since it uses less digits than its factorization.

1144664635 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32333.

The product of its digits is 207360, while the sum is 40.

The square root of 1144664635 is about 33832.8927968035. The cubic root of 1144664635 is about 1046.0668073568.

The spelling of 1144664635 in words is "one billion, one hundred forty-four million, six hundred sixty-four thousand, six hundred thirty-five".