2648653921 has 2 divisors, whose sum is σ = 2648653922. Its totient is φ = 2648653920.

The previous prime is 2648653867. The next prime is 2648653927. The reversal of 2648653921 is 1293568462.

2648653921 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2278630225 + 370023696 = 47735^2 + 19236^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2648653921 is a prime.

It is not a weakly prime, because it can be changed into another prime (2648653927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1324326960 + 1324326961.

It is an arithmetic number, because the mean of its divisors is an integer number (1324326961).

Almost surely, 2^2648653921 is an apocalyptic number.

It is an amenable number.

2648653921 is a deficient number, since it is larger than the sum of its proper divisors (1).

2648653921 is an equidigital number, since it uses as much as digits as its factorization.

2648653921 is an evil number, because the sum of its binary digits is even.

The product of its digits is 622080, while the sum is 46.

The square root of 2648653921 is about 51465.0747692063. The cubic root of 2648653921 is about 1383.5931568989.

The spelling of 2648653921 in words is "two billion, six hundred forty-eight million, six hundred fifty-three thousand, nine hundred twenty-one".