5649543816 has 32 divisors (see below), whose sum is σ = 16141554240. Its totient is φ = 1614155328.

The previous prime is 5649543799. The next prime is 5649543821. The reversal of 5649543816 is 6183459465.

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, 16813951 + ... + 16814286.

It is an arithmetic number, because the mean of its divisors is an integer number (504423570).

Almost surely, 2^5649543816 is an apocalyptic number.

5649543816 is a gapful number since it is divisible by the number (56) formed by its first and last digit.

It is an amenable number.

5649543816 is an abundant number, since it is smaller than the sum of its proper divisors (10492010424).

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

5649543816 is a wasteful number, since it uses less digits than its factorization.

5649543816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33628253 (or 33628249 counting only the distinct ones).

The product of its digits is 3110400, while the sum is 51.

The square root of 5649543816 is about 75163.4473397808. The cubic root of 5649543816 is about 1781.0295579855.

The spelling of 5649543816 in words is "five billion, six hundred forty-nine million, five hundred forty-three thousand, eight hundred sixteen".