1648119509 has 2 divisors, whose sum is σ = 1648119510. Its totient is φ = 1648119508.

The previous prime is 1648119461. The next prime is 1648119541. The reversal of 1648119509 is 9059118461.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1163151025 + 484968484 = 34105^2 + 22022^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1648119509 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1648119509.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1648112509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 824059754 + 824059755.

It is an arithmetic number, because the mean of its divisors is an integer number (824059755).

Almost surely, 2^1648119509 is an apocalyptic number.

It is an amenable number.

1648119509 is a deficient number, since it is larger than the sum of its proper divisors (1).

1648119509 is an equidigital number, since it uses as much as digits as its factorization.

1648119509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 77760, while the sum is 44.

The square root of 1648119509 is about 40597.0381801431. The cubic root of 1648119509 is about 1181.2166683427.

The spelling of 1648119509 in words is "one billion, six hundred forty-eight million, one hundred nineteen thousand, five hundred nine".