5161417661 has 2 divisors, whose sum is σ = 5161417662. Its totient is φ = 5161417660.

The previous prime is 5161417543. The next prime is 5161417669. The reversal of 5161417661 is 1667141615.

5161417661 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4811503225 + 349914436 = 69365^2 + 18706^2 .

It is a cyclic number.

It is not a de Polignac number, because 5161417661 - 2²⁶ = 5094308797 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5161417669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2580708830 + 2580708831.

It is an arithmetic number, because the mean of its divisors is an integer number (2580708831).

Almost surely, 2^5161417661 is an apocalyptic number.

It is an amenable number.

5161417661 is a deficient number, since it is larger than the sum of its proper divisors (1).

5161417661 is an equidigital number, since it uses as much as digits as its factorization.

5161417661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 30240, while the sum is 38.

The square root of 5161417661 is about 71843.0070431354. The cubic root of 5161417661 is about 1728.1827578275.

The spelling of 5161417661 in words is "five billion, one hundred sixty-one million, four hundred seventeen thousand, six hundred sixty-one".