128885041323391 has 12 divisors (see below), whose sum is σ = 136914274266408. Its totient is φ = 121301981558912.

The previous prime is 128885041323319. The next prime is 128885041323427. The reversal of 128885041323391 is 193323140588821.

It is not a de Polignac number, because 128885041323391 - 2¹¹ = 128885041321343 is a prime.

It is a super-2 number, since 2×128885041323391² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128885041321391) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19512780 + ... + 25268926.

It is an arithmetic number, because the mean of its divisors is an integer number (11409522855534).

Almost surely, 2^{128885041323391} is an apocalyptic number.

128885041323391 is a deficient number, since it is larger than the sum of its proper divisors (8029232943017).

128885041323391 is an equidigital number, since it uses as much as digits as its factorization.

128885041323391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5833658 (or 5833641 counting only the distinct ones).

The product of its (nonzero) digits is 9953280, while the sum is 58.

The spelling of 128885041323391 in words is "one hundred twenty-eight trillion, eight hundred eighty-five billion, forty-one million, three hundred twenty-three thousand, three hundred ninety-one".