63803783664 has 120 divisors (see below), whose sum is σ = 182508318720. Its totient is φ = 20798626944.

The previous prime is 63803783653. The next prime is 63803783677. The reversal of 63803783664 is 46638730836.

63803783664 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 63803783664.

It is a congruent number.

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, 10548289 + ... + 10554335.

It is an arithmetic number, because the mean of its divisors is an integer number (1520902656).

Almost surely, 2^63803783664 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 63803783664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (91254159360).

63803783664 is an abundant number, since it is smaller than the sum of its proper divisors (118704535056).

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

63803783664 is a wasteful number, since it uses less digits than its factorization.

63803783664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7667 (or 7658 counting only the distinct ones).

The product of its (nonzero) digits is 10450944, while the sum is 54.

The spelling of 63803783664 in words is "sixty-three billion, eight hundred three million, seven hundred eighty-three thousand, six hundred sixty-four".