128354808654343 has 16 divisors (see below), whose sum is σ = 132235226100736. Its totient is φ = 124515414021600.

The previous prime is 128354808654301. The next prime is 128354808654353. The reversal of 128354808654343 is 343456808453821.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-128354808654343 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128354808654353) 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, 31636405 + ... + 35462257.

It is an arithmetic number, because the mean of its divisors is an integer number (8264701631296).

Almost surely, 2^{128354808654343} is an apocalyptic number.

128354808654343 is a deficient number, since it is larger than the sum of its proper divisors (3880417446393).

128354808654343 is a wasteful number, since it uses less digits than its factorization.

128354808654343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3831214.

The product of its (nonzero) digits is 265420800, while the sum is 64.

The spelling of 128354808654343 in words is "one hundred twenty-eight trillion, three hundred fifty-four billion, eight hundred eight million, six hundred fifty-four thousand, three hundred forty-three".