5505552781 has 2 divisors, whose sum is σ = 5505552782. Its totient is φ = 5505552780.

The previous prime is 5505552779. The next prime is 5505552809. The reversal of 5505552781 is 1872555055.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4285797156 + 1219755625 = 65466^2 + 34925^2 .

It is a cyclic number.

It is not a de Polignac number, because 5505552781 - 2¹ = 5505552779 is a prime.

It is a super-2 number, since 2×5505552781² = 60622222848753667922, which contains 22 as substring.

Together with 5505552779, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5505552721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2752776390 + 2752776391.

It is an arithmetic number, because the mean of its divisors is an integer number (2752776391).

Almost surely, 2^5505552781 is an apocalyptic number.

It is an amenable number.

5505552781 is a deficient number, since it is larger than the sum of its proper divisors (1).

5505552781 is an equidigital number, since it uses as much as digits as its factorization.

5505552781 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 350000, while the sum is 43.

The square root of 5505552781 is about 74199.4122685618. The cubic root of 5505552781 is about 1765.7680057761.

The spelling of 5505552781 in words is "five billion, five hundred five million, five hundred fifty-two thousand, seven hundred eighty-one".