64445161225 has 6 divisors (see below), whose sum is σ = 79911999950. Its totient is φ = 51556128960.

The previous prime is 64445161201. The next prime is 64445161237. The reversal of 64445161225 is 52216154446.

It can be written as a sum of positive squares in 3 ways, for example, as 5406366784 + 59038794441 = 73528^2 + 242979^2 .

It is not a de Polignac number, because 64445161225 - 2⁹ = 64445160713 is a prime.

It is an unprimeable number.

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, 1288903200 + ... + 1288903249.

Almost surely, 2^64445161225 is an apocalyptic number.

It is an amenable number.

64445161225 is a deficient number, since it is larger than the sum of its proper divisors (15466838725).

64445161225 is a wasteful number, since it uses less digits than its factorization.

64445161225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2577806459 (or 2577806454 counting only the distinct ones).

The product of its digits is 230400, while the sum is 40.

The spelling of 64445161225 in words is "sixty-four billion, four hundred forty-five million, one hundred sixty-one thousand, two hundred twenty-five".