128509163595456 has 168 divisors, whose sum is σ = 408285204028416. Its totient is φ = 35532487549440.

The previous prime is 128509163595437. The next prime is 128509163595457. The reversal of 128509163595456 is 654595361905821.

It is a tau number, because it is divible by the number of its divisors (168).

It is not an unprimeable number, because it can be changed into a prime (128509163595457) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 220023876 + ... + 220607171.

Almost surely, 2^{128509163595456} is an apocalyptic number.

128509163595456 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

128509163595456 is an abundant number, since it is smaller than the sum of its proper divisors (279776040432960).

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

128509163595456 is a wasteful number, since it uses less digits than its factorization.

128509163595456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 440631107 (or 440631090 counting only the distinct ones).

The product of its (nonzero) digits is 349920000, while the sum is 69.

The spelling of 128509163595456 in words is "one hundred twenty-eight trillion, five hundred nine billion, one hundred sixty-three million, five hundred ninety-five thousand, four hundred fifty-six".