128765657549760 has 3584 divisors, whose sum is σ = 564363583488000. Its totient is φ = 24648899788800.

The previous prime is 128765657549681. The next prime is 128765657549761. The reversal of 128765657549760 is 67945756567821.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128765657549761) by changing a digit.

It is a polite number, since it can be written in 511 ways as a sum of consecutive naturals, for example, 1763913117084 + ... + 1763913117156.

Almost surely, 2^{128765657549760} is an apocalyptic number.

128765657549760 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 128765657549760, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (282181791744000).

128765657549760 is an abundant number, since it is smaller than the sum of its proper divisors (435597925938240).

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

128765657549760 is an equidigital number, since it uses as much as digits as its factorization.

128765657549760 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 253 (or 191 counting only the distinct ones).

The product of its (nonzero) digits is 5334336000, while the sum is 78.

The spelling of 128765657549760 in words is "one hundred twenty-eight trillion, seven hundred sixty-five billion, six hundred fifty-seven million, five hundred forty-nine thousand, seven hundred sixty".