5185118557 has 2 divisors, whose sum is σ = 5185118558. Its totient is φ = 5185118556.

The previous prime is 5185118503. The next prime is 5185118573. The reversal of 5185118557 is 7558115815.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4985207236 + 199911321 = 70606^2 + 14139^2 .

It is a cyclic number.

It is not a de Polignac number, because 5185118557 - 2⁷ = 5185118429 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5185118657) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2592559278 + 2592559279.

It is an arithmetic number, because the mean of its divisors is an integer number (2592559279).

Almost surely, 2^5185118557 is an apocalyptic number.

It is an amenable number.

5185118557 is a deficient number, since it is larger than the sum of its proper divisors (1).

5185118557 is an equidigital number, since it uses as much as digits as its factorization.

5185118557 is an evil number, because the sum of its binary digits is even.

The product of its digits is 280000, while the sum is 46.

The square root of 5185118557 is about 72007.7673379754. The cubic root of 5185118557 is about 1730.8239536850.

The spelling of 5185118557 in words is "five billion, one hundred eighty-five million, one hundred eighteen thousand, five hundred fifty-seven".