645464527 has 2 divisors, whose sum is σ = 645464528. Its totient is φ = 645464526.

The previous prime is 645464497. The next prime is 645464549. The reversal of 645464527 is 725464546.

645464527 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 645464527 - 2¹¹ = 645462479 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (645464597) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 322732263 + 322732264.

It is an arithmetic number, because the mean of its divisors is an integer number (322732264).

Almost surely, 2^645464527 is an apocalyptic number.

645464527 is a deficient number, since it is larger than the sum of its proper divisors (1).

645464527 is an equidigital number, since it uses as much as digits as its factorization.

645464527 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 806400, while the sum is 43.

The square root of 645464527 is about 25405.9939187586. The cubic root of 645464527 is about 864.2196296469.

The spelling of 645464527 in words is "six hundred forty-five million, four hundred sixty-four thousand, five hundred twenty-seven".