128746303551647 has 4 divisors (see below), whose sum is σ = 128746774514736. Its totient is φ = 128745832588560.

The previous prime is 128746303551599. The next prime is 128746303551661. The reversal of 128746303551647 is 746155303647821.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 128746303551647 - 2¹⁸ = 128746303289503 is a prime.

It is a super-3 number, since 3×128746303551647³ (a number of 43 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 128746303551647.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128746303251647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 235071254 + ... + 235618307.

It is an arithmetic number, because the mean of its divisors is an integer number (32186693628684).

Almost surely, 2^{128746303551647} is an apocalyptic number.

128746303551647 is a deficient number, since it is larger than the sum of its proper divisors (470963089).

128746303551647 is an equidigital number, since it uses as much as digits as its factorization.

128746303551647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 470963088.

The product of its (nonzero) digits is 101606400, while the sum is 62.

The spelling of 128746303551647 in words is "one hundred twenty-eight trillion, seven hundred forty-six billion, three hundred three million, five hundred fifty-one thousand, six hundred forty-seven".