5515665641 has 2 divisors, whose sum is σ = 5515665642. Its totient is φ = 5515665640.

The previous prime is 5515665613. The next prime is 5515665647. The reversal of 5515665641 is 1465665155.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5115825625 + 399840016 = 71525^2 + 19996^2 .

It is a cyclic number.

It is not a de Polignac number, because 5515665641 - 2¹⁸ = 5515403497 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 5515665592 and 5515665601.

It is not a weakly prime, because it can be changed into another prime (5515665647) 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, 2757832820 + 2757832821.

It is an arithmetic number, because the mean of its divisors is an integer number (2757832821).

Almost surely, 2^5515665641 is an apocalyptic number.

It is an amenable number.

5515665641 is a deficient number, since it is larger than the sum of its proper divisors (1).

5515665641 is an equidigital number, since it uses as much as digits as its factorization.

5515665641 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 540000, while the sum is 44.

The square root of 5515665641 is about 74267.5275002474. The cubic root of 5515665641 is about 1766.8484932393.

The spelling of 5515665641 in words is "five billion, five hundred fifteen million, six hundred sixty-five thousand, six hundred forty-one".