128546438535 has 16 divisors (see below), whose sum is σ = 228527002080. Its totient is φ = 68558100480.

The previous prime is 128546438533. The next prime is 128546438599. The reversal of 128546438535 is 535834645821.

128546438535 is a `hidden beast` number, since 1 + 2 + 8 + 546 + 43 + 8 + 53 + 5 = 666.

It is not a de Polignac number, because 128546438535 - 2¹ = 128546438533 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128546438533) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 476097786 + ... + 476098055.

It is an arithmetic number, because the mean of its divisors is an integer number (14282937630).

Almost surely, 2^128546438535 is an apocalyptic number.

128546438535 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

128546438535 is a deficient number, since it is larger than the sum of its proper divisors (99980563545).

128546438535 is an equidigital number, since it uses as much as digits as its factorization.

128546438535 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 952195855 (or 952195849 counting only the distinct ones).

The product of its digits is 13824000, while the sum is 54.

The spelling of 128546438535 in words is "one hundred twenty-eight billion, five hundred forty-six million, four hundred thirty-eight thousand, five hundred thirty-five".