128432374815 has 16 divisors (see below), whose sum is σ = 209369004768. Its totient is φ = 67204864896.

The previous prime is 128432374801. The next prime is 128432374817. The reversal of 128432374815 is 518473234821.

It is a happy number.

It is not a de Polignac number, because 128432374815 - 2⁶ = 128432374751 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128432374817) 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, 80774284 + ... + 80775873.

It is an arithmetic number, because the mean of its divisors is an integer number (13085562798).

Almost surely, 2^128432374815 is an apocalyptic number.

128432374815 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

128432374815 is a deficient number, since it is larger than the sum of its proper divisors (80936629953).

128432374815 is a wasteful number, since it uses less digits than its factorization.

128432374815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161550218.

The product of its digits is 1290240, while the sum is 48.

The spelling of 128432374815 in words is "one hundred twenty-eight billion, four hundred thirty-two million, three hundred seventy-four thousand, eight hundred fifteen".