63691867008 has 384 divisors, whose sum is σ = 229825290240. Its totient is φ = 16447795200.

The previous prime is 63691866991. The next prime is 63691867037. The reversal of 63691867008 is 80076819636.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (384).

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, 16053441 + ... + 16057407.

It is an arithmetic number, because the mean of its divisors is an integer number (598503360).

Almost surely, 2^63691867008 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 63691867008, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (114912645120).

63691867008 is an abundant number, since it is smaller than the sum of its proper divisors (166133423232).

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

63691867008 is a wasteful number, since it uses less digits than its factorization.

63691867008 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4186 (or 4171 counting only the distinct ones).

The product of its (nonzero) digits is 2612736, while the sum is 54.

The spelling of 63691867008 in words is "sixty-three billion, six hundred ninety-one million, eight hundred sixty-seven thousand, eight".