128864127645 has 48 divisors (see below), whose sum is σ = 245423505600. Its totient is φ = 62030050560.

The previous prime is 128864127641. The next prime is 128864127647. The reversal of 128864127645 is 546721468821.

It is not a de Polignac number, because 128864127645 - 2² = 128864127641 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 128864127591 and 128864127600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128864127641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 867640 + ... + 1005249.

It is an arithmetic number, because the mean of its divisors is an integer number (5112989700).

Almost surely, 2^128864127645 is an apocalyptic number.

128864127645 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

128864127645 is a deficient number, since it is larger than the sum of its proper divisors (116559377955).

128864127645 is a wasteful number, since it uses less digits than its factorization.

128864127645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1873050 (or 1873047 counting only the distinct ones).

The product of its digits is 5160960, while the sum is 54.

The spelling of 128864127645 in words is "one hundred twenty-eight billion, eight hundred sixty-four million, one hundred twenty-seven thousand, six hundred forty-five".