63818681836 has 96 divisors (see below), whose sum is σ = 150236577792. Its totient is φ = 22995256320.

The previous prime is 63818681777. The next prime is 63818681863.

63818681836 is nontrivially palindromic in base 10.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 25485 + ... + 358171.

It is an arithmetic number, because the mean of its divisors is an integer number (1564964352).

Almost surely, 2^63818681836 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 63818681836, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (75118288896).

63818681836 is an abundant number, since it is smaller than the sum of its proper divisors (86417895956).

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

63818681836 is a wasteful number, since it uses less digits than its factorization.

63818681836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 332759 (or 332757 counting only the distinct ones).

The product of its digits is 7962624, while the sum is 58.

The spelling of 63818681836 in words is "sixty-three billion, eight hundred eighteen million, six hundred eighty-one thousand, eight hundred thirty-six".