5643547881 has 32 divisors (see below), whose sum is σ = 7946065920. Its totient is φ = 3555788544.

The previous prime is 5643547879. The next prime is 5643547883. The reversal of 5643547881 is 1887453465.

It is an interprime number because it is at equal distance from previous prime (5643547879) and next prime (5643547883).

It is not a de Polignac number, because 5643547881 - 2¹ = 5643547879 is a prime.

It is a super-2 number, since 2×5643547881² = 63699265370279180322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (5643547883) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5592705 + ... + 5593713.

It is an arithmetic number, because the mean of its divisors is an integer number (248314560).

Almost surely, 2^5643547881 is an apocalyptic number.

It is an amenable number.

5643547881 is a deficient number, since it is larger than the sum of its proper divisors (2302518039).

5643547881 is a wasteful number, since it uses less digits than its factorization.

5643547881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1925.

The product of its digits is 3225600, while the sum is 51.

The square root of 5643547881 is about 75123.5507747071. The cubic root of 5643547881 is about 1780.3992582694.

The spelling of 5643547881 in words is "five billion, six hundred forty-three million, five hundred forty-seven thousand, eight hundred eighty-one".