5500555561 has 2 divisors, whose sum is σ = 5500555562. Its totient is φ = 5500555560.

The previous prime is 5500555507. The next prime is 5500555573. The reversal of 5500555561 is 1655550055.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4258345536 + 1242210025 = 65256^2 + 35245^2 .

It is a cyclic number.

It is not a de Polignac number, because 5500555561 - 2¹³ = 5500547369 is a prime.

It is a super-2 number, since 2×5500555561² = 60512222959296049442, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 5500555561.

It is not a weakly prime, because it can be changed into another prime (5500555591) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2750277780 + 2750277781.

It is an arithmetic number, because the mean of its divisors is an integer number (2750277781).

Almost surely, 2^5500555561 is an apocalyptic number.

It is an amenable number.

5500555561 is a deficient number, since it is larger than the sum of its proper divisors (1).

5500555561 is an equidigital number, since it uses as much as digits as its factorization.

5500555561 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 93750, while the sum is 37.

The square root of 5500555561 is about 74165.7303678727. The cubic root of 5500555561 is about 1765.2335997181.

The spelling of 5500555561 in words is "five billion, five hundred million, five hundred fifty-five thousand, five hundred sixty-one".