5661258517 has 2 divisors, whose sum is σ = 5661258518. Its totient is φ = 5661258516.

The previous prime is 5661258503. The next prime is 5661258539. The reversal of 5661258517 is 7158521665.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5339809476 + 321449041 = 73074^2 + 17929^2 .

It is a cyclic number.

It is not a de Polignac number, because 5661258517 - 2⁷ = 5661258389 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5661258217) 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 as a sum of consecutive naturals, namely, 2830629258 + 2830629259.

It is an arithmetic number, because the mean of its divisors is an integer number (2830629259).

Almost surely, 2^5661258517 is an apocalyptic number.

It is an amenable number.

5661258517 is a deficient number, since it is larger than the sum of its proper divisors (1).

5661258517 is an equidigital number, since it uses as much as digits as its factorization.

5661258517 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 504000, while the sum is 46.

The square root of 5661258517 is about 75241.3351622630. The cubic root of 5661258517 is about 1782.2597354356.

The spelling of 5661258517 in words is "five billion, six hundred sixty-one million, two hundred fifty-eight thousand, five hundred seventeen".