63840829338 has 192 divisors, whose sum is σ = 165275510400. Its totient is φ = 17555719680.

The previous prime is 63840829309. The next prime is 63840829363. The reversal of 63840829338 is 83392804836.

It is a happy number.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 38997856 + ... + 38999492.

It is an arithmetic number, because the mean of its divisors is an integer number (860809950).

Almost surely, 2^63840829338 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 63840829338, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (82637755200).

63840829338 is an abundant number, since it is smaller than the sum of its proper divisors (101434681062).

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

63840829338 is a wasteful number, since it uses less digits than its factorization.

63840829338 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1917 (or 1914 counting only the distinct ones).

The product of its (nonzero) digits is 5971968, while the sum is 54.

The spelling of 63840829338 in words is "sixty-three billion, eight hundred forty million, eight hundred twenty-nine thousand, three hundred thirty-eight".