128127396647 has 8 divisors (see below), whose sum is σ = 128457014400. Its totient is φ = 127797961720.

The previous prime is 128127396643. The next prime is 128127396673. The reversal of 128127396647 is 746693721821.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 128127396647 - 2² = 128127396643 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 128127396592 and 128127396601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128127396643) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1417622 + ... + 1505292.

It is an arithmetic number, because the mean of its divisors is an integer number (16057126800).

Almost surely, 2^128127396647 is an apocalyptic number.

128127396647 is a deficient number, since it is larger than the sum of its proper divisors (329617753).

128127396647 is an equidigital number, since it uses as much as digits as its factorization.

128127396647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91413.

The product of its digits is 6096384, while the sum is 56.

The spelling of 128127396647 in words is "one hundred twenty-eight billion, one hundred twenty-seven million, three hundred ninety-six thousand, six hundred forty-seven".