5185556641 has 2 divisors, whose sum is σ = 5185556642. Its totient is φ = 5185556640.

The previous prime is 5185556633. The next prime is 5185556693. The reversal of 5185556641 is 1466555815.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3401339041 + 1784217600 = 58321^2 + 42240^2 .

It is a cyclic number.

It is not a de Polignac number, because 5185556641 - 2³ = 5185556633 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 5185556591 and 5185556600.

It is not a weakly prime, because it can be changed into another prime (5188556641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2592778320 + 2592778321.

It is an arithmetic number, because the mean of its divisors is an integer number (2592778321).

Almost surely, 2^5185556641 is an apocalyptic number.

It is an amenable number.

5185556641 is a deficient number, since it is larger than the sum of its proper divisors (1).

5185556641 is an equidigital number, since it uses as much as digits as its factorization.

5185556641 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 720000, while the sum is 46.

The square root of 5185556641 is about 72010.8091955645. The cubic root of 5185556641 is about 1730.8726973424.

The spelling of 5185556641 in words is "five billion, one hundred eighty-five million, five hundred fifty-six thousand, six hundred forty-one".