128568769560 has 960 divisors, whose sum is σ = 555617905920. Its totient is φ = 26363957760.

The previous prime is 128568769507. The next prime is 128568769577. The reversal of 128568769560 is 65967865821.

128568769560 is a `hidden beast` number, since 1 + 2 + 8 + 5 + 6 + 8 + 7 + 69 + 560 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 239 ways as a sum of consecutive naturals, for example, 144947437 + ... + 144948323.

It is an arithmetic number, because the mean of its divisors is an integer number (578768652).

Almost surely, 2^128568769560 is an apocalyptic number.

128568769560 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 128568769560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (277808952960).

128568769560 is an abundant number, since it is smaller than the sum of its proper divisors (427049136360).

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

128568769560 is a wasteful number, since it uses less digits than its factorization.

128568769560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1018 (or 998 counting only the distinct ones).

The product of its (nonzero) digits is 43545600, while the sum is 63.

The spelling of 128568769560 in words is "one hundred twenty-eight billion, five hundred sixty-eight million, seven hundred sixty-nine thousand, five hundred sixty".