645265530067 has 2 divisors, whose sum is σ = 645265530068. Its totient is φ = 645265530066.

The previous prime is 645265530043. The next prime is 645265530071. The reversal of 645265530067 is 760035562546.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 645265530067 - 2³¹ = 643118046419 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 645265530067.

It is not a weakly prime, because it can be changed into another prime (645265530037) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 322632765033 + 322632765034.

It is an arithmetic number, because the mean of its divisors is an integer number (322632765034).

Almost surely, 2^645265530067 is an apocalyptic number.

645265530067 is a deficient number, since it is larger than the sum of its proper divisors (1).

645265530067 is an equidigital number, since it uses as much as digits as its factorization.

645265530067 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4536000, while the sum is 49.

The spelling of 645265530067 in words is "six hundred forty-five billion, two hundred sixty-five million, five hundred thirty thousand, sixty-seven".