63831622428 has 144 divisors (see below), whose sum is σ = 193663491840. Its totient is φ = 18128148192.

The previous prime is 63831622403. The next prime is 63831622447. The reversal of 63831622428 is 82422613836.

63831622428 is a `hidden beast` number, since 63 + 8 + 3 + 162 + 2 + 428 = 666.

63831622428 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 847651 + ... + 919877.

It is an arithmetic number, because the mean of its divisors is an integer number (1344885360).

Almost surely, 2^63831622428 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 63831622428, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (96831745920).

63831622428 is an abundant number, since it is smaller than the sum of its proper divisors (129831869412).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

63831622428 is a wasteful number, since it uses less digits than its factorization.

63831622428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72421 (or 72406 counting only the distinct ones).

The product of its digits is 663552, while the sum is 45.

The spelling of 63831622428 in words is "sixty-three billion, eight hundred thirty-one million, six hundred twenty-two thousand, four hundred twenty-eight".