63673344225 has 18 divisors (see below), whose sum is σ = 114046034726. Its totient is φ = 33959116800.

The previous prime is 63673344191. The next prime is 63673344283. The reversal of 63673344225 is 52244337636.

63673344225 is a `hidden beast` number, since 636 + 7 + 3 + 3 + 4 + 4 + 2 + 2 + 5 = 666.

It can be written as a sum of positive squares in 3 ways, for example, as 3228171489 + 60445172736 = 56817^2 + 245856^2 .

It is not a de Polignac number, because 63673344225 - 2¹⁹ = 63672819937 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Duffinian number.

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 17 ways as a sum of consecutive naturals, for example, 141496096 + ... + 141496545.

Almost surely, 2^63673344225 is an apocalyptic number.

It is an amenable number.

63673344225 is a deficient number, since it is larger than the sum of its proper divisors (50372690501).

63673344225 is a wasteful number, since it uses less digits than its factorization.

63673344225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 282992657 (or 282992649 counting only the distinct ones).

The product of its digits is 2177280, while the sum is 45.

The spelling of 63673344225 in words is "sixty-three billion, six hundred seventy-three million, three hundred forty-four thousand, two hundred twenty-five".