2544663664 has 10 divisors (see below), whose sum is σ = 4930285880. Its totient is φ = 1272331824.

The previous prime is 2544663659. The next prime is 2544663689. The reversal of 2544663664 is 4663664452.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 79520724 + ... + 79520755.

It is an arithmetic number, because the mean of its divisors is an integer number (493028588).

Almost surely, 2^2544663664 is an apocalyptic number.

It is an amenable number.

2544663664 is a deficient number, since it is larger than the sum of its proper divisors (2385622216).

2544663664 is a wasteful number, since it uses less digits than its factorization.

2544663664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159041487 (or 159041481 counting only the distinct ones).

The product of its digits is 2488320, while the sum is 46.

The square root of 2544663664 is about 50444.6594200020. The cubic root of 2544663664 is about 1365.2435376133.

The spelling of 2544663664 in words is "two billion, five hundred forty-four million, six hundred sixty-three thousand, six hundred sixty-four".