5661881171616 has 48 divisors (see below), whose sum is σ = 15508631041344. Its totient is φ = 1805237474304.

The previous prime is 5661881171563. The next prime is 5661881171633. The reversal of 5661881171616 is 6161711881665.

It is a tau number, because it is divible by the number of its divisors (48).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1282126681 + ... + 1282131096.

It is an arithmetic number, because the mean of its divisors is an integer number (323096480028).

Almost surely, 2^{5661881171616} is an apocalyptic number.

It is an amenable number.

5661881171616 is an abundant number, since it is smaller than the sum of its proper divisors (9846749869728).

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

5661881171616 is a wasteful number, since it uses less digits than its factorization.

5661881171616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2564257813 (or 2564257805 counting only the distinct ones).

The product of its digits is 2903040, while the sum is 57.

The spelling of 5661881171616 in words is "five trillion, six hundred sixty-one billion, eight hundred eighty-one million, one hundred seventy-one thousand, six hundred sixteen".