5581144668 has 24 divisors (see below), whose sum is σ = 14206550400. Its totient is φ = 1691255920.

The previous prime is 5581144643. The next prime is 5581144669. The reversal of 5581144668 is 8664411855.

It is a super-2 number, since 2×5581144668² = 62298351610289660448, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5581144669) 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, 21140568 + ... + 21140831.

It is an arithmetic number, because the mean of its divisors is an integer number (591939600).

Almost surely, 2^5581144668 is an apocalyptic number.

It is an amenable number.

5581144668 is an abundant number, since it is smaller than the sum of its proper divisors (8625405732).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

5581144668 is a wasteful number, since it uses less digits than its factorization.

5581144668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42281417 (or 42281415 counting only the distinct ones).

The product of its digits is 921600, while the sum is 48.

The square root of 5581144668 is about 74707.0590238968. The cubic root of 5581144668 is about 1773.8126999267.

The spelling of 5581144668 in words is "five billion, five hundred eighty-one million, one hundred forty-four thousand, six hundred sixty-eight".