4991846369 has 2 divisors, whose sum is σ = 4991846370. Its totient is φ = 4991846368.

The previous prime is 4991846351. The next prime is 4991846381. The reversal of 4991846369 is 9636481994.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4319118400 + 672727969 = 65720^2 + 25937^2 .

It is a cyclic number.

It is not a de Polignac number, because 4991846369 - 2⁸ = 4991846113 is a prime.

It is a super-2 number, since 2×4991846369² = 49837060343396968322, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (4991846389) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2495923184 + 2495923185.

It is an arithmetic number, because the mean of its divisors is an integer number (2495923185).

Almost surely, 2^4991846369 is an apocalyptic number.

It is an amenable number.

4991846369 is a deficient number, since it is larger than the sum of its proper divisors (1).

4991846369 is an equidigital number, since it uses as much as digits as its factorization.

4991846369 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10077696, while the sum is 59.

The square root of 4991846369 is about 70652.9997169264. Note that the first 3 decimals coincide. The cubic root of 4991846369 is about 1709.0459401055.

The spelling of 4991846369 in words is "four billion, nine hundred ninety-one million, eight hundred forty-six thousand, three hundred sixty-nine".