645750485069 has 2 divisors, whose sum is σ = 645750485070. Its totient is φ = 645750485068.

The previous prime is 645750485057. The next prime is 645750485113. The reversal of 645750485069 is 960584057546.

645750485069 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 339015062500 + 306735422569 = 582250^2 + 553837^2 .

It is a cyclic number.

It is not a de Polignac number, because 645750485069 - 2²⁸ = 645482049613 is a prime.

It is a super-2 number, since 2×645750485069² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 645750484999 and 645750485017.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (645750485669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 322875242534 + 322875242535.

It is an arithmetic number, because the mean of its divisors is an integer number (322875242535).

Almost surely, 2^645750485069 is an apocalyptic number.

It is an amenable number.

645750485069 is a deficient number, since it is larger than the sum of its proper divisors (1).

645750485069 is an equidigital number, since it uses as much as digits as its factorization.

645750485069 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36288000, while the sum is 59.

The spelling of 645750485069 in words is "six hundred forty-five billion, seven hundred fifty million, four hundred eighty-five thousand, sixty-nine".