5181345779 has 2 divisors, whose sum is σ = 5181345780. Its totient is φ = 5181345778.

The previous prime is 5181345761. The next prime is 5181345803. The reversal of 5181345779 is 9775431815.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 5181345779 - 2²⁰ = 5180297203 is a prime.

It is a super-2 number, since 2×5181345779² = 53692688163122233682, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (5181345979) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2590672889 + 2590672890.

It is an arithmetic number, because the mean of its divisors is an integer number (2590672890).

Almost surely, 2^5181345779 is an apocalyptic number.

5181345779 is a deficient number, since it is larger than the sum of its proper divisors (1).

5181345779 is an equidigital number, since it uses as much as digits as its factorization.

5181345779 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1058400, while the sum is 50.

The square root of 5181345779 is about 71981.5655497989. The cubic root of 5181345779 is about 1730.4040597851.

The spelling of 5181345779 in words is "five billion, one hundred eighty-one million, three hundred forty-five thousand, seven hundred seventy-nine".