128881283969 has 4 divisors (see below), whose sum is σ = 129240285120. Its totient is φ = 128522282820.

The previous prime is 128881283959. The next prime is 128881284019. The reversal of 128881283969 is 969382188821.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 969382188821 = 1109 ⋅874104769.

It is a cyclic number.

It is not a de Polignac number, because 128881283969 - 2¹² = 128881279873 is a prime.

It is a super-2 number, since 2×128881283969² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (128881283929) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 179500037 + ... + 179500754.

It is an arithmetic number, because the mean of its divisors is an integer number (32310071280).

Almost surely, 2^128881283969 is an apocalyptic number.

It is an amenable number.

128881283969 is a deficient number, since it is larger than the sum of its proper divisors (359001151).

128881283969 is an equidigital number, since it uses as much as digits as its factorization.

128881283969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 359001150.

The product of its digits is 23887872, while the sum is 65.

The spelling of 128881283969 in words is "one hundred twenty-eight billion, eight hundred eighty-one million, two hundred eighty-three thousand, nine hundred sixty-nine".