5500005500621 has 2 divisors, whose sum is σ = 5500005500622. Its totient is φ = 5500005500620.

The previous prime is 5500005500609. The next prime is 5500005500641. The reversal of 5500005500621 is 1260055000055.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3726617898025 + 1773387602596 = 1930445^2 + 1331686^2 .

It is a cyclic number.

It is not a de Polignac number, because 5500005500621 - 2³⁰ = 5498931758797 is a prime.

It is a super-2 number, since 2×5500005500621² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5500005500641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2750002750310 + 2750002750311.

It is an arithmetic number, because the mean of its divisors is an integer number (2750002750311).

Almost surely, 2^{5500005500621} is an apocalyptic number.

It is an amenable number.

5500005500621 is a deficient number, since it is larger than the sum of its proper divisors (1).

5500005500621 is an equidigital number, since it uses as much as digits as its factorization.

5500005500621 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7500, while the sum is 29.

The spelling of 5500005500621 in words is "five trillion, five hundred billion, five million, five hundred thousand, six hundred twenty-one".