645413314529 has 2 divisors, whose sum is σ = 645413314530. Its totient is φ = 645413314528.

The previous prime is 645413314517. The next prime is 645413314619. The reversal of 645413314529 is 925413314546.

It is a happy number.

645413314529 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., 636408253504 + 9005061025 = 797752^2 + 94895^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-645413314529 is a prime.

It is not a weakly prime, because it can be changed into another prime (645413314129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 322706657264 + 322706657265.

It is an arithmetic number, because the mean of its divisors is an integer number (322706657265).

Almost surely, 2^645413314529 is an apocalyptic number.

It is an amenable number.

645413314529 is a deficient number, since it is larger than the sum of its proper divisors (1).

645413314529 is an equidigital number, since it uses as much as digits as its factorization.

645413314529 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1555200, while the sum is 47.

The spelling of 645413314529 in words is "six hundred forty-five billion, four hundred thirteen million, three hundred fourteen thousand, five hundred twenty-nine".