63551761635625 has 20 divisors (see below), whose sum is σ = 79423836264916. Its totient is φ = 50835292200000.

The previous prime is 63551761635619. The next prime is 63551761635697. The reversal of 63551761635625 is 52653616715536.

63551761635625 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 10 ways, for example, as 49763825705104 + 13787935930521 = 7054348^2 + 3713211^2 .

It is not a de Polignac number, because 63551761635625 - 2³¹ = 63549614151977 is a prime.

It is a Smith number, since the sum of its digits (61) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 914826 + ... + 11311075.

Almost surely, 2^{63551761635625} is an apocalyptic number.

It is an amenable number.

63551761635625 is a deficient number, since it is larger than the sum of its proper divisors (15872074629291).

63551761635625 is an equidigital number, since it uses as much as digits as its factorization.

63551761635625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12234238 (or 12234223 counting only the distinct ones).

The product of its digits is 102060000, while the sum is 61.

The spelling of 63551761635625 in words is "sixty-three trillion, five hundred fifty-one billion, seven hundred sixty-one million, six hundred thirty-five thousand, six hundred twenty-five".