63500855616 has 252 divisors, whose sum is σ = 210933609120. Its totient is φ = 18110238720.

The previous prime is 63500855609. The next prime is 63500855647. The reversal of 63500855616 is 61655800536.

63500855616 is a `hidden beast` number, since 6 + 3 + 5 + 0 + 0 + 85 + 561 + 6 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1813765 + ... + 1848443.

Almost surely, 2^63500855616 is an apocalyptic number.

63500855616 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 63500855616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (105466804560).

63500855616 is an abundant number, since it is smaller than the sum of its proper divisors (147432753504).

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

63500855616 is a wasteful number, since it uses less digits than its factorization.

63500855616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34742 (or 34712 counting only the distinct ones).

The product of its (nonzero) digits is 648000, while the sum is 45.

The spelling of 63500855616 in words is "sixty-three billion, five hundred million, eight hundred fifty-five thousand, six hundred sixteen".