645028650349 has 2 divisors, whose sum is σ = 645028650350. Its totient is φ = 645028650348.

The previous prime is 645028650281. The next prime is 645028650359. The reversal of 645028650349 is 943056820546.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 392314322500 + 252714327849 = 626350^2 + 502707^2 .

It is a cyclic number.

It is not a de Polignac number, because 645028650349 - 2²⁷ = 644894432621 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 645028650296 and 645028650305.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (645028650359) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 322514325174 + 322514325175.

It is an arithmetic number, because the mean of its divisors is an integer number (322514325175).

Almost surely, 2^645028650349 is an apocalyptic number.

It is an amenable number.

645028650349 is a deficient number, since it is larger than the sum of its proper divisors (1).

645028650349 is an equidigital number, since it uses as much as digits as its factorization.

645028650349 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6220800, while the sum is 52.

The spelling of 645028650349 in words is "six hundred forty-five billion, twenty-eight million, six hundred fifty thousand, three hundred forty-nine".