5156161909 has 2 divisors, whose sum is σ = 5156161910. Its totient is φ = 5156161908.

The previous prime is 5156161891. The next prime is 5156161921. The reversal of 5156161909 is 9091616515.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4127677009 + 1028484900 = 64247^2 + 32070^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5156161909 is a prime.

It is a super-3 number, since 3×5156161909³ (a number of 30 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5156161979) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2578080954 + 2578080955.

It is an arithmetic number, because the mean of its divisors is an integer number (2578080955).

Almost surely, 2^5156161909 is an apocalyptic number.

It is an amenable number.

5156161909 is a deficient number, since it is larger than the sum of its proper divisors (1).

5156161909 is an equidigital number, since it uses as much as digits as its factorization.

5156161909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72900, while the sum is 43.

The square root of 5156161909 is about 71806.4196921139. The cubic root of 5156161909 is about 1727.5959691261.

The spelling of 5156161909 in words is "five billion, one hundred fifty-six million, one hundred sixty-one thousand, nine hundred nine".