1144664621 has 8 divisors (see below), whose sum is σ = 1264693824. Its totient is φ = 1030490560.

The previous prime is 1144664611. The next prime is 1144664623. The reversal of 1144664621 is 1264664411.

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

It is a cyclic number.

It is not a de Polignac number, because 1144664621 - 2¹⁸ = 1144402477 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1144664623) 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, 1463375 + ... + 1464156.

It is an arithmetic number, because the mean of its divisors is an integer number (158086728).

Almost surely, 2^1144664621 is an apocalyptic number.

It is an amenable number.

1144664621 is a deficient number, since it is larger than the sum of its proper divisors (120029203).

1144664621 is a wasteful number, since it uses less digits than its factorization.

1144664621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2927571.

The product of its digits is 27648, while the sum is 35.

The square root of 1144664621 is about 33832.8925899043. The cubic root of 1144664621 is about 1046.0668030921.

It can be divided in two parts, 11446 and 64621, that added together give a palindrome (76067).

The spelling of 1144664621 in words is "one billion, one hundred forty-four million, six hundred sixty-four thousand, six hundred twenty-one".