63894778368 has 320 divisors, whose sum is σ = 184817635200. Its totient is φ = 19552665600.

The previous prime is 63894778331. The next prime is 63894778439. The reversal of 63894778368 is 86387749836.

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, 156221748 + ... + 156222156.

It is an arithmetic number, because the mean of its divisors is an integer number (577555110).

Almost surely, 2^63894778368 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 63894778368, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (92408817600).

63894778368 is an abundant number, since it is smaller than the sum of its proper divisors (120922856832).

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

63894778368 is a wasteful number, since it uses less digits than its factorization.

63894778368 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 603 (or 587 counting only the distinct ones).

The product of its digits is 292626432, while the sum is 69.

The spelling of 63894778368 in words is "sixty-three billion, eight hundred ninety-four million, seven hundred seventy-eight thousand, three hundred sixty-eight".