63861181600 has 144 divisors (see below), whose sum is σ = 158748198840. Its totient is φ = 25082265600.

The previous prime is 63861181583. The next prime is 63861181661. The reversal of 63861181600 is 618116836.

63861181600 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 12 ways, for example, as 5816807824 + 58044373776 = 76268^2 + 240924^2 .

It is a Harshad number since it is a multiple of its sum of digits (40).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9850360 + ... + 9856840.

Almost surely, 2^63861181600 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 63861181600, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (79374099420).

63861181600 is an abundant number, since it is smaller than the sum of its proper divisors (94887017240).

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

63861181600 is a wasteful number, since it uses less digits than its factorization.

63861181600 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6723 (or 6710 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 40.

The spelling of 63861181600 in words is "sixty-three billion, eight hundred sixty-one million, one hundred eighty-one thousand, six hundred".