128015627780 has 192 divisors, whose sum is σ = 308016414720. Its totient is φ = 44433100800.

The previous prime is 128015627743. The next prime is 128015627827. The reversal of 128015627780 is 87726510821.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 26278745 + ... + 26283615.

It is an arithmetic number, because the mean of its divisors is an integer number (1604252160).

Almost surely, 2^128015627780 is an apocalyptic number.

128015627780 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 128015627780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (154008207360).

128015627780 is an abundant number, since it is smaller than the sum of its proper divisors (180000786940).

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

128015627780 is a wasteful number, since it uses less digits than its factorization.

128015627780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5050 (or 5048 counting only the distinct ones).

The product of its (nonzero) digits is 376320, while the sum is 47.

The spelling of 128015627780 in words is "one hundred twenty-eight billion, fifteen million, six hundred twenty-seven thousand, seven hundred eighty".