2145806863 has 2 divisors, whose sum is σ = 2145806864. Its totient is φ = 2145806862.

The previous prime is 2145806849. The next prime is 2145806891. The reversal of 2145806863 is 3686085412.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2145806863 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2145806063) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1072903431 + 1072903432.

It is an arithmetic number, because the mean of its divisors is an integer number (1072903432).

Almost surely, 2^2145806863 is an apocalyptic number.

2145806863 is a deficient number, since it is larger than the sum of its proper divisors (1).

2145806863 is an equidigital number, since it uses as much as digits as its factorization.

2145806863 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 276480, while the sum is 43.

The square root of 2145806863 is about 46322.8546508092. The cubic root of 2145806863 is about 1289.8232762736.

The spelling of 2145806863 in words is "two billion, one hundred forty-five million, eight hundred six thousand, eight hundred sixty-three".