63811782816 has 96 divisors (see below), whose sum is σ = 174965132160. Its totient is φ = 20337644544.

The previous prime is 63811782799. The next prime is 63811782833. The reversal of 63811782816 is 61828711836.

It is a happy number.

63811782816 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (63811782799) and next prime (63811782833).

It is a tau number, because it is divible by the number of its divisors (96).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 175486 + ... + 398018.

It is an arithmetic number, because the mean of its divisors is an integer number (1822553460).

Almost surely, 2^63811782816 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 63811782816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (87482566080).

63811782816 is an abundant number, since it is smaller than the sum of its proper divisors (111153349344).

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

63811782816 is a wasteful number, since it uses less digits than its factorization.

63811782816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 222678 (or 222670 counting only the distinct ones).

The product of its digits is 774144, while the sum is 51.

The spelling of 63811782816 in words is "sixty-three billion, eight hundred eleven million, seven hundred eighty-two thousand, eight hundred sixteen".