1648361641 has 2 divisors, whose sum is σ = 1648361642. Its totient is φ = 1648361640.

The previous prime is 1648361609. The next prime is 1648361651. The reversal of 1648361641 is 1461638461.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1536953616 + 111408025 = 39204^2 + 10555^2 .

It is a cyclic number.

It is not a de Polignac number, because 1648361641 - 2⁵ = 1648361609 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1648361594 and 1648361603.

It is not a weakly prime, because it can be changed into another prime (1648361651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 824180820 + 824180821.

It is an arithmetic number, because the mean of its divisors is an integer number (824180821).

Almost surely, 2^1648361641 is an apocalyptic number.

It is an amenable number.

1648361641 is a deficient number, since it is larger than the sum of its proper divisors (1).

1648361641 is an equidigital number, since it uses as much as digits as its factorization.

1648361641 is an evil number, because the sum of its binary digits is even.

The product of its digits is 82944, while the sum is 40.

The square root of 1648361641 is about 40600.0202093546. The cubic root of 1648361641 is about 1181.2745113061.

The spelling of 1648361641 in words is "one billion, six hundred forty-eight million, three hundred sixty-one thousand, six hundred forty-one".