645421162063 has 2 divisors, whose sum is σ = 645421162064. Its totient is φ = 645421162062.

The previous prime is 645421162051. The next prime is 645421162069. The reversal of 645421162063 is 360261124546.

645421162063 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 is a cyclic number.

It is not a de Polignac number, because 645421162063 - 2²⁹ = 644884291151 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (645421162069) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 322710581031 + 322710581032.

It is an arithmetic number, because the mean of its divisors is an integer number (322710581032).

Almost surely, 2^645421162063 is an apocalyptic number.

645421162063 is a deficient number, since it is larger than the sum of its proper divisors (1).

645421162063 is an equidigital number, since it uses as much as digits as its factorization.

645421162063 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 207360, while the sum is 40.

The spelling of 645421162063 in words is "six hundred forty-five billion, four hundred twenty-one million, one hundred sixty-two thousand, sixty-three".