645606450325 has 6 divisors (see below), whose sum is σ = 800551998434. Its totient is φ = 516485160240.

The previous prime is 645606450271. The next prime is 645606450343. The reversal of 645606450325 is 523054606546.

It can be written as a sum of positive squares in 3 ways, for example, as 11112954724 + 634493495601 = 105418^2 + 796551^2 .

It is not a de Polignac number, because 645606450325 - 2¹³ = 645606442133 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 12912128982 + ... + 12912129031.

Almost surely, 2^645606450325 is an apocalyptic number.

It is an amenable number.

645606450325 is a deficient number, since it is larger than the sum of its proper divisors (154945548109).

645606450325 is a wasteful number, since it uses less digits than its factorization.

645606450325 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25824258023 (or 25824258018 counting only the distinct ones).

The product of its (nonzero) digits is 2592000, while the sum is 46.

The spelling of 645606450325 in words is "six hundred forty-five billion, six hundred six million, four hundred fifty thousand, three hundred twenty-five".