128753763864 has 128 divisors (see below), whose sum is σ = 361018183680. Its totient is φ = 37926374400.

The previous prime is 128753763863. The next prime is 128753763871. The reversal of 128753763864 is 468367357821.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 128753763798 and 128753763807.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128753763863) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2976777 + ... + 3019719.

It is an arithmetic number, because the mean of its divisors is an integer number (2820454560).

Almost surely, 2^128753763864 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 128753763864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (180509091840).

128753763864 is an abundant number, since it is smaller than the sum of its proper divisors (232264419816).

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

128753763864 is a wasteful number, since it uses less digits than its factorization.

128753763864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43281 (or 43277 counting only the distinct ones).

The product of its digits is 40642560, while the sum is 60.

The spelling of 128753763864 in words is "one hundred twenty-eight billion, seven hundred fifty-three million, seven hundred sixty-three thousand, eight hundred sixty-four".