128216804786353 has 2 divisors, whose sum is σ = 128216804786354. Its totient is φ = 128216804786352.

The previous prime is 128216804786299. The next prime is 128216804786437. The reversal of 128216804786353 is 353687408612821.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 75501988099344 + 52714816687009 = 8689188^2 + 7260497^2 .

It is a cyclic number.

It is not a de Polignac number, because 128216804786353 - 2⁴⁵ = 93032432697521 is a prime.

It is not a weakly prime, because it can be changed into another prime (128216804186353) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64108402393176 + 64108402393177.

It is an arithmetic number, because the mean of its divisors is an integer number (64108402393177).

Almost surely, 2^{128216804786353} is an apocalyptic number.

It is an amenable number.

128216804786353 is a deficient number, since it is larger than the sum of its proper divisors (1).

128216804786353 is an equidigital number, since it uses as much as digits as its factorization.

128216804786353 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 92897280, while the sum is 64.

The spelling of 128216804786353 in words is "one hundred twenty-eight trillion, two hundred sixteen billion, eight hundred four million, seven hundred eighty-six thousand, three hundred fifty-three".