128741691780 has 288 divisors, whose sum is σ = 439409408256. Its totient is φ = 30273205248.

The previous prime is 128741691779. The next prime is 128741691797. The reversal of 128741691780 is 87196147821.

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 95 ways as a sum of consecutive naturals, for example, 79814254 + ... + 79815866.

It is an arithmetic number, because the mean of its divisors is an integer number (1525727112).

Almost surely, 2^128741691780 is an apocalyptic number.

128741691780 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 128741691780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (219704704128).

128741691780 is an abundant number, since it is smaller than the sum of its proper divisors (310667716476).

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

128741691780 is a wasteful number, since it uses less digits than its factorization.

128741691780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3147 (or 3142 counting only the distinct ones).

The product of its (nonzero) digits is 1354752, while the sum is 54.

The spelling of 128741691780 in words is "one hundred twenty-eight billion, seven hundred forty-one million, six hundred ninety-one thousand, seven hundred eighty".