128763639347 has 8 divisors (see below), whose sum is σ = 150289476096. Its totient is φ = 108020560392.

The previous prime is 128763639343. The next prime is 128763639349. The reversal of 128763639347 is 743936367821.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 128763639347 - 2² = 128763639343 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (128763639341) 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 7 ways as a sum of consecutive naturals, for example, 195689093 + ... + 195689750.

It is an arithmetic number, because the mean of its divisors is an integer number (18786184512).

Almost surely, 2^128763639347 is an apocalyptic number.

128763639347 is a deficient number, since it is larger than the sum of its proper divisors (21525836749).

128763639347 is an equidigital number, since it uses as much as digits as its factorization.

128763639347 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 391378897.

The product of its digits is 27433728, while the sum is 59.

The spelling of 128763639347 in words is "one hundred twenty-eight billion, seven hundred sixty-three million, six hundred thirty-nine thousand, three hundred forty-seven".