645750485113 has 2 divisors, whose sum is σ = 645750485114. Its totient is φ = 645750485112.

The previous prime is 645750485069. The next prime is 645750485123. The reversal of 645750485113 is 311584057546.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 626839559824 + 18910925289 = 791732^2 + 137517^2 .

It is a cyclic number.

It is not a de Polignac number, because 645750485113 - 2⁹ = 645750484601 is a prime.

It is not a weakly prime, because it can be changed into another prime (645750485123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 322875242556 + 322875242557.

It is an arithmetic number, because the mean of its divisors is an integer number (322875242557).

Almost surely, 2^645750485113 is an apocalyptic number.

It is an amenable number.

645750485113 is a deficient number, since it is larger than the sum of its proper divisors (1).

645750485113 is an equidigital number, since it uses as much as digits as its factorization.

645750485113 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2016000, while the sum is 49.

The spelling of 645750485113 in words is "six hundred forty-five billion, seven hundred fifty million, four hundred eighty-five thousand, one hundred thirteen".