4148665849 has 2 divisors, whose sum is σ = 4148665850. Its totient is φ = 4148665848.

The previous prime is 4148665837. The next prime is 4148665879. The reversal of 4148665849 is 9485668414.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2869530624 + 1279135225 = 53568^2 + 35765^2 .

It is a cyclic number.

It is not a de Polignac number, because 4148665849 - 2⁷ = 4148665721 is a prime.

It is a super-2 number, since 2×4148665849² = 34422856653317781602, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 4148665849.

It is not a weakly prime, because it can be changed into another prime (4148665819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2074332924 + 2074332925.

It is an arithmetic number, because the mean of its divisors is an integer number (2074332925).

Almost surely, 2^4148665849 is an apocalyptic number.

It is an amenable number.

4148665849 is a deficient number, since it is larger than the sum of its proper divisors (1).

4148665849 is an equidigital number, since it uses as much as digits as its factorization.

4148665849 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6635520, while the sum is 55.

The square root of 4148665849 is about 64410.1377812530. The cubic root of 4148665849 is about 1606.8283494930.

The spelling of 4148665849 in words is "four billion, one hundred forty-eight million, six hundred sixty-five thousand, eight hundred forty-nine".