5555549521 has 2 divisors, whose sum is σ = 5555549522. Its totient is φ = 5555549520.

The previous prime is 5555549509. The next prime is 5555549537. The reversal of 5555549521 is 1259455555.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3117658896 + 2437890625 = 55836^2 + 49375^2 .

It is a cyclic number.

It is not a de Polignac number, because 5555549521 - 2³¹ = 3408065873 is a prime.

It is not a weakly prime, because it can be changed into another prime (5555549551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2777774760 + 2777774761.

It is an arithmetic number, because the mean of its divisors is an integer number (2777774761).

Almost surely, 2^5555549521 is an apocalyptic number.

It is an amenable number.

5555549521 is a deficient number, since it is larger than the sum of its proper divisors (1).

5555549521 is an equidigital number, since it uses as much as digits as its factorization.

5555549521 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1125000, while the sum is 46.

The square root of 5555549521 is about 74535.5587689527. The cubic root of 5555549521 is about 1771.0969740369.

The spelling of 5555549521 in words is "five billion, five hundred fifty-five million, five hundred forty-nine thousand, five hundred twenty-one".