5518690393 has 2 divisors, whose sum is σ = 5518690394. Its totient is φ = 5518690392.

The previous prime is 5518690379. The next prime is 5518690417. The reversal of 5518690393 is 3930968155.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5507420944 + 11269449 = 74212^2 + 3357^2 .

It is a cyclic number.

It is not a de Polignac number, because 5518690393 - 2⁵ = 5518690361 is a prime.

It is not a weakly prime, because it can be changed into another prime (5518690693) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2759345196 + 2759345197.

It is an arithmetic number, because the mean of its divisors is an integer number (2759345197).

Almost surely, 2^5518690393 is an apocalyptic number.

It is an amenable number.

5518690393 is a deficient number, since it is larger than the sum of its proper divisors (1).

5518690393 is an equidigital number, since it uses as much as digits as its factorization.

5518690393 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 874800, while the sum is 49.

The square root of 5518690393 is about 74287.8886023826. Note that the first 3 decimals coincide. The cubic root of 5518690393 is about 1767.1714099543.

The spelling of 5518690393 in words is "five billion, five hundred eighteen million, six hundred ninety thousand, three hundred ninety-three".