128553671 has 2 divisors, whose sum is σ = 128553672. Its totient is φ = 128553670.

The previous prime is 128553653. The next prime is 128553707. The reversal of 128553671 is 176355821.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 128553671 - 2¹⁰ = 128552647 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (128553871) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64276835 + 64276836.

It is an arithmetic number, because the mean of its divisors is an integer number (64276836).

Almost surely, 2^128553671 is an apocalyptic number.

128553671 is a deficient number, since it is larger than the sum of its proper divisors (1).

128553671 is an equidigital number, since it uses as much as digits as its factorization.

128553671 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 50400, while the sum is 38.

The square root of 128553671 is about 11338.1511279397. The cubic root of 128553671 is about 504.6940224042.

The spelling of 128553671 in words is "one hundred twenty-eight million, five hundred fifty-three thousand, six hundred seventy-one".