5243447644 has 24 divisors (see below), whose sum is σ = 9338002128. Its totient is φ = 2575797120.

The previous prime is 5243447639. The next prime is 5243447719. The reversal of 5243447644 is 4467443425.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 5243447644.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16464 + ... + 103720.

It is an arithmetic number, because the mean of its divisors is an integer number (389083422).

Almost surely, 2^5243447644 is an apocalyptic number.

It is an amenable number.

5243447644 is a deficient number, since it is larger than the sum of its proper divisors (4094554484).

5243447644 is a wasteful number, since it uses less digits than its factorization.

5243447644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87525 (or 87523 counting only the distinct ones).

The product of its digits is 1290240, while the sum is 43.

The square root of 5243447644 is about 72411.6540620362. The cubic root of 5243447644 is about 1737.2899686014.

The spelling of 5243447644 in words is "five billion, two hundred forty-three million, four hundred forty-seven thousand, six hundred forty-four".