128123853927 has 16 divisors (see below), whose sum is σ = 184208881920. Its totient is φ = 78946660800.

The previous prime is 128123853917. The next prime is 128123853943. The reversal of 128123853927 is 729358321821.

It is not a de Polignac number, because 128123853927 - 2⁴ = 128123853911 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 128123853927.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128123853917) 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, 27409699 + ... + 27414372.

It is an arithmetic number, because the mean of its divisors is an integer number (11513055120).

Almost surely, 2^128123853927 is an apocalyptic number.

128123853927 is a deficient number, since it is larger than the sum of its proper divisors (56085027993).

128123853927 is a wasteful number, since it uses less digits than its factorization.

128123853927 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54824134.

The product of its digits is 1451520, while the sum is 51.

The spelling of 128123853927 in words is "one hundred twenty-eight billion, one hundred twenty-three million, eight hundred fifty-three thousand, nine hundred twenty-seven".