63994625376 has 192 divisors, whose sum is σ = 195571998720. Its totient is φ = 18107228160.

The previous prime is 63994625347. The next prime is 63994625413. The reversal of 63994625376 is 67352649936.

63994625376 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 31 ways as a sum of consecutive naturals, for example, 2265870 + ... + 2293938.

It is an arithmetic number, because the mean of its divisors is an integer number (1018604160).

Almost surely, 2^63994625376 is an apocalyptic number.

63994625376 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 63994625376, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (97785999360).

63994625376 is an abundant number, since it is smaller than the sum of its proper divisors (131577373344).

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

63994625376 is a wasteful number, since it uses less digits than its factorization.

63994625376 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28237 (or 28229 counting only the distinct ones).

The product of its digits is 44089920, while the sum is 60.

The spelling of 63994625376 in words is "sixty-three billion, nine hundred ninety-four million, six hundred twenty-five thousand, three hundred seventy-six".