63855366336 has 280 divisors, whose sum is σ = 196666866000. Its totient is φ = 20461787136.

The previous prime is 63855366283. The next prime is 63855366359. The reversal of 63855366336 is 63366355836.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 40439595 + ... + 40441173.

Almost surely, 2^63855366336 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 63855366336, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (98333433000).

63855366336 is an abundant number, since it is smaller than the sum of its proper divisors (132811499664).

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

63855366336 is a wasteful number, since it uses less digits than its factorization.

63855366336 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1901 (or 1882 counting only the distinct ones).

The product of its digits is 20995200, while the sum is 54.

The spelling of 63855366336 in words is "sixty-three billion, eight hundred fifty-five million, three hundred sixty-six thousand, three hundred thirty-six".