645430301225 has 6 divisors (see below), whose sum is σ = 800333573550. Its totient is φ = 516344240960.

The previous prime is 645430301221. The next prime is 645430301231. The reversal of 645430301225 is 522103034546.

It can be written as a sum of positive squares in 3 ways, for example, as 95879406736 + 549550894489 = 309644^2 + 741317^2 .

It is not a de Polignac number, because 645430301225 - 2² = 645430301221 is a prime.

It is not an unprimeable number, because it can be changed into a prime (645430301221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 12908606000 + ... + 12908606049.

It is an arithmetic number, because the mean of its divisors is an integer number (133388928925).

Almost surely, 2^645430301225 is an apocalyptic number.

It is an amenable number.

645430301225 is a deficient number, since it is larger than the sum of its proper divisors (154903272325).

645430301225 is a wasteful number, since it uses less digits than its factorization.

645430301225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25817212059 (or 25817212054 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 35.

The spelling of 645430301225 in words is "six hundred forty-five billion, four hundred thirty million, three hundred one thousand, two hundred twenty-five".