5591509115161 has 2 divisors, whose sum is σ = 5591509115162. Its totient is φ = 5591509115160.

The previous prime is 5591509115123. The next prime is 5591509115191. The reversal of 5591509115161 is 1615119051955.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3226621838400 + 2364887276761 = 1796280^2 + 1537819^2 .

It is a cyclic number.

It is not a de Polignac number, because 5591509115161 - 2¹⁹ = 5591508590873 is a prime.

It is not a weakly prime, because it can be changed into another prime (5591509115111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2795754557580 + 2795754557581.

It is an arithmetic number, because the mean of its divisors is an integer number (2795754557581).

Almost surely, 2^{5591509115161} is an apocalyptic number.

It is an amenable number.

5591509115161 is a deficient number, since it is larger than the sum of its proper divisors (1).

5591509115161 is an equidigital number, since it uses as much as digits as its factorization.

5591509115161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 303750, while the sum is 49.

The spelling of 5591509115161 in words is "five trillion, five hundred ninety-one billion, five hundred nine million, one hundred fifteen thousand, one hundred sixty-one".