128646403215 has 36 divisors (see below), whose sum is σ = 226274435352. Its totient is φ = 62366604960.

The previous prime is 128646403153. The next prime is 128646403241. The reversal of 128646403215 is 512304646821.

It is not a de Polignac number, because 128646403215 - 2⁷ = 128646403087 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 15276276 + ... + 15284694.

It is an arithmetic number, because the mean of its divisors is an integer number (6285400982).

Almost surely, 2^128646403215 is an apocalyptic number.

128646403215 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

128646403215 is a deficient number, since it is larger than the sum of its proper divisors (97628032137).

128646403215 is an frugal number, since it uses more digits than its factorization.

128646403215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16868 (or 8438 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 42.

The spelling of 128646403215 in words is "one hundred twenty-eight billion, six hundred forty-six million, four hundred three thousand, two hundred fifteen".