128705543025 has 48 divisors (see below), whose sum is σ = 222165780480. Its totient is φ = 65622779200.

The previous prime is 128705542997. The next prime is 128705543051. The reversal of 128705543025 is 520345507821.

It is not a de Polignac number, because 128705543025 - 2⁹ = 128705542513 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3311656 + ... + 3350294.

It is an arithmetic number, because the mean of its divisors is an integer number (4628453760).

Almost surely, 2^128705543025 is an apocalyptic number.

128705543025 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

128705543025 is a deficient number, since it is larger than the sum of its proper divisors (93460237455).

128705543025 is a wasteful number, since it uses less digits than its factorization.

128705543025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40606 (or 40601 counting only the distinct ones).

The product of its (nonzero) digits is 336000, while the sum is 42.

The spelling of 128705543025 in words is "one hundred twenty-eight billion, seven hundred five million, five hundred forty-three thousand, twenty-five".