5516445621 has 8 divisors (see below), whose sum is σ = 7384565664. Its totient is φ = 3662978000.

The previous prime is 5516445611. The next prime is 5516445631. The reversal of 5516445621 is 1265446155.

It is an interprime number because it is at equal distance from previous prime (5516445611) and next prime (5516445631).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 5516445621 - 2⁵ = 5516445589 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 5516445621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5516445611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3662226 + ... + 3663731.

It is an arithmetic number, because the mean of its divisors is an integer number (923070708).

Almost surely, 2^5516445621 is an apocalyptic number.

It is an amenable number.

5516445621 is a deficient number, since it is larger than the sum of its proper divisors (1868120043).

5516445621 is a wasteful number, since it uses less digits than its factorization.

5516445621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7326211.

The product of its digits is 144000, while the sum is 39.

The square root of 5516445621 is about 74272.7784655994. The cubic root of 5516445621 is about 1766.9317737003.

The spelling of 5516445621 in words is "five billion, five hundred sixteen million, four hundred forty-five thousand, six hundred twenty-one".