5111801909 has 2 divisors, whose sum is σ = 5111801910. Its totient is φ = 5111801908.

The previous prime is 5111801897. The next prime is 5111801923. The reversal of 5111801909 is 9091081115.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3946603684 + 1165198225 = 62822^2 + 34135^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5111801909 is a prime.

It is a super-2 number, since 2×5111801909² = 52261037513712088562, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5111801969) 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, 2555900954 + 2555900955.

It is an arithmetic number, because the mean of its divisors is an integer number (2555900955).

Almost surely, 2^5111801909 is an apocalyptic number.

It is an amenable number.

5111801909 is a deficient number, since it is larger than the sum of its proper divisors (1).

5111801909 is an equidigital number, since it uses as much as digits as its factorization.

5111801909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3240, while the sum is 35.

The square root of 5111801909 is about 71496.8664278372. The cubic root of 5111801909 is about 1722.6273516657.

The spelling of 5111801909 in words is "five billion, one hundred eleven million, eight hundred one thousand, nine hundred nine".