2650643663 has 2 divisors, whose sum is σ = 2650643664. Its totient is φ = 2650643662.

The previous prime is 2650643641. The next prime is 2650643687. The reversal of 2650643663 is 3663460562.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2650643663 - 2¹⁸ = 2650381519 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2650643663.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2650643603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1325321831 + 1325321832.

It is an arithmetic number, because the mean of its divisors is an integer number (1325321832).

Almost surely, 2^2650643663 is an apocalyptic number.

2650643663 is a deficient number, since it is larger than the sum of its proper divisors (1).

2650643663 is an equidigital number, since it uses as much as digits as its factorization.

2650643663 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 466560, while the sum is 41.

The square root of 2650643663 is about 51484.4021330733. The cubic root of 2650643663 is about 1383.9395346452.

The spelling of 2650643663 in words is "two billion, six hundred fifty million, six hundred forty-three thousand, six hundred sixty-three".