5116172561 has 2 divisors, whose sum is σ = 5116172562. Its totient is φ = 5116172560.

The previous prime is 5116172531. The next prime is 5116172569. The reversal of 5116172561 is 1652716115.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3866974225 + 1249198336 = 62185^2 + 35344^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5116172561 is a prime.

It is not a weakly prime, because it can be changed into another prime (5116172569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2558086280 + 2558086281.

It is an arithmetic number, because the mean of its divisors is an integer number (2558086281).

Almost surely, 2^5116172561 is an apocalyptic number.

It is an amenable number.

5116172561 is a deficient number, since it is larger than the sum of its proper divisors (1).

5116172561 is an equidigital number, since it uses as much as digits as its factorization.

5116172561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12600, while the sum is 35.

The square root of 5116172561 is about 71527.4252367580. The cubic root of 5116172561 is about 1723.1181674965.

Adding to 5116172561 its reverse (1652716115), we get a palindrome (6768888676).

The spelling of 5116172561 in words is "five billion, one hundred sixteen million, one hundred seventy-two thousand, five hundred sixty-one".