645010567 has 2 divisors, whose sum is σ = 645010568. Its totient is φ = 645010566.

The previous prime is 645010507. The next prime is 645010591. The reversal of 645010567 is 765010546.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 645010567 - 2²³ = 636621959 is a prime.

It is a super-2 number, since 2×645010567² = 832077263083322978, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (645010507) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 322505283 + 322505284.

It is an arithmetic number, because the mean of its divisors is an integer number (322505284).

Almost surely, 2^645010567 is an apocalyptic number.

645010567 is a deficient number, since it is larger than the sum of its proper divisors (1).

645010567 is an equidigital number, since it uses as much as digits as its factorization.

645010567 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 25200, while the sum is 34.

The square root of 645010567 is about 25397.0582351579. The cubic root of 645010567 is about 864.0169781007.

The spelling of 645010567 in words is "six hundred forty-five million, ten thousand, five hundred sixty-seven".