5661889444 has 6 divisors (see below), whose sum is σ = 9908306534. Its totient is φ = 2830944720.

The previous prime is 5661889433. The next prime is 5661889447. The reversal of 5661889444 is 4449881665.

It can be written as a sum of positive squares in only one way, i.e., 5656544100 + 5345344 = 75210^2 + 2312^2 .

It is not an unprimeable number, because it can be changed into a prime (5661889447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 707736177 + ... + 707736184.

Almost surely, 2^5661889444 is an apocalyptic number.

It is an amenable number.

5661889444 is a deficient number, since it is larger than the sum of its proper divisors (4246417090).

5661889444 is a wasteful number, since it uses less digits than its factorization.

5661889444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1415472365 (or 1415472363 counting only the distinct ones).

The product of its digits is 6635520, while the sum is 55.

The square root of 5661889444 is about 75245.5277342116. The cubic root of 5661889444 is about 1782.3259417991.

The spelling of 5661889444 in words is "five billion, six hundred sixty-one million, eight hundred eighty-nine thousand, four hundred forty-four".