645274162207 has 2 divisors, whose sum is σ = 645274162208. Its totient is φ = 645274162206.

The previous prime is 645274162201. The next prime is 645274162219. The reversal of 645274162207 is 702261472546.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 645274162207 - 2²⁷ = 645139944479 is a prime.

It is a super-2 number, since 2×645274162207² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (645274162201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 322637081103 + 322637081104.

It is an arithmetic number, because the mean of its divisors is an integer number (322637081104).

Almost surely, 2^645274162207 is an apocalyptic number.

645274162207 is a deficient number, since it is larger than the sum of its proper divisors (1).

645274162207 is an equidigital number, since it uses as much as digits as its factorization.

645274162207 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1128960, while the sum is 46.

The spelling of 645274162207 in words is "six hundred forty-five billion, two hundred seventy-four million, one hundred sixty-two thousand, two hundred seven".