5506805621 has 16 divisors (see below), whose sum is σ = 6017256960. Its totient is φ = 5025706560.

The previous prime is 5506805617. The next prime is 5506805639. The reversal of 5506805621 is 1265086055.

It is a cyclic number.

It is not a de Polignac number, because 5506805621 - 2² = 5506805617 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 (5506805641) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32570 + ... + 109883.

It is an arithmetic number, because the mean of its divisors is an integer number (376078560).

Almost surely, 2^5506805621 is an apocalyptic number.

It is an amenable number.

5506805621 is a deficient number, since it is larger than the sum of its proper divisors (510451339).

5506805621 is a wasteful number, since it uses less digits than its factorization.

5506805621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142556.

The product of its (nonzero) digits is 72000, while the sum is 38.

The square root of 5506805621 is about 74207.8541732612. The cubic root of 5506805621 is about 1765.9019346230.

The spelling of 5506805621 in words is "five billion, five hundred six million, eight hundred five thousand, six hundred twenty-one".