1444776664 has 16 divisors (see below), whose sum is σ = 2710300320. Its totient is φ = 722029920.

The previous prime is 1444776647. The next prime is 1444776667. The reversal of 1444776664 is 4666774441.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1444776667) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27267 + ... + 60274.

It is an arithmetic number, because the mean of its divisors is an integer number (169393770).

Almost surely, 2^1444776664 is an apocalyptic number.

It is an amenable number.

1444776664 is a deficient number, since it is larger than the sum of its proper divisors (1265523656).

1444776664 is a wasteful number, since it uses less digits than its factorization.

1444776664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89610 (or 89606 counting only the distinct ones).

The product of its digits is 2709504, while the sum is 49.

The square root of 1444776664 is about 38010.2178894044. The cubic root of 1444776664 is about 1130.4904712915.

The spelling of 1444776664 in words is "one billion, four hundred forty-four million, seven hundred seventy-six thousand, six hundred sixty-four".