5555206557 has 20 divisors (see below), whose sum is σ = 8312970556. Its totient is φ = 3697021440.

The previous prime is 5555206519. The next prime is 5555206571. The reversal of 5555206557 is 7556025555.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 3577714596 + 1977491961 = 59814^2 + 44469^2 .

It is not a de Polignac number, because 5555206557 - 2¹⁰ = 5555205533 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5555206597) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 12694 + ... + 106167.

Almost surely, 2^5555206557 is an apocalyptic number.

It is an amenable number.

5555206557 is a deficient number, since it is larger than the sum of its proper divisors (2757763999).

5555206557 is a wasteful number, since it uses less digits than its factorization.

5555206557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119450 (or 119441 counting only the distinct ones).

The product of its (nonzero) digits is 1312500, while the sum is 45.

The square root of 5555206557 is about 74533.2580597414. The cubic root of 5555206557 is about 1771.0605278972.

The spelling of 5555206557 in words is "five billion, five hundred fifty-five million, two hundred six thousand, five hundred fifty-seven".