5559821791 has 4 divisors (see below), whose sum is σ = 5559973792. Its totient is φ = 5559669792.

The previous prime is 5559821777. The next prime is 5559821801. The reversal of 5559821791 is 1971289555.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 5559821791 - 2²³ = 5551433183 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5559821731) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15946 + ... + 106648.

It is an arithmetic number, because the mean of its divisors is an integer number (1389993448).

Almost surely, 2^5559821791 is an apocalyptic number.

5559821791 is a deficient number, since it is larger than the sum of its proper divisors (152001).

5559821791 is an equidigital number, since it uses as much as digits as its factorization.

5559821791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152000.

The product of its digits is 1134000, while the sum is 52.

The square root of 5559821791 is about 74564.2125352370. The cubic root of 5559821791 is about 1771.5508544720.

The spelling of 5559821791 in words is "five billion, five hundred fifty-nine million, eight hundred twenty-one thousand, seven hundred ninety-one".