63943889445 has 24 divisors (see below), whose sum is σ = 114658011000. Its totient is φ = 32927427456.

The previous prime is 63943889413. The next prime is 63943889459. The reversal of 63943889445 is 54498834936.

63943889445 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 4 ways, for example, as 9203332356 + 54740557089 = 95934^2 + 233967^2 .

It is not a de Polignac number, because 63943889445 - 2⁵ = 63943889413 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 24498270 + ... + 24500879.

It is an arithmetic number, because the mean of its divisors is an integer number (4777417125).

Almost surely, 2^63943889445 is an apocalyptic number.

It is an amenable number.

63943889445 is a deficient number, since it is larger than the sum of its proper divisors (50714121555).

63943889445 is a wasteful number, since it uses less digits than its factorization.

63943889445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48999189 (or 48999186 counting only the distinct ones).

The product of its digits is 89579520, while the sum is 63.

The spelling of 63943889445 in words is "sixty-three billion, nine hundred forty-three million, eight hundred eighty-nine thousand, four hundred forty-five".