63765111728 has 80 divisors (see below), whose sum is σ = 134722329600. Its totient is φ = 29125681920.

The previous prime is 63765111719. The next prime is 63765111769. The reversal of 63765111728 is 82711156736.

63765111728 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 2655038 + ... + 2678946.

It is an arithmetic number, because the mean of its divisors is an integer number (1684029120).

Almost surely, 2^63765111728 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 63765111728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (67361164800).

63765111728 is an abundant number, since it is smaller than the sum of its proper divisors (70957217872).

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

63765111728 is a wasteful number, since it uses less digits than its factorization.

63765111728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24250 (or 24244 counting only the distinct ones).

The product of its digits is 423360, while the sum is 47.

The spelling of 63765111728 in words is "sixty-three billion, seven hundred sixty-five million, one hundred eleven thousand, seven hundred twenty-eight".