128235158911 has 4 divisors (see below), whose sum is σ = 128242747152. Its totient is φ = 128227570672.

The previous prime is 128235158867. The next prime is 128235158927. The reversal of 128235158911 is 119851532821.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 119851532821 = 36901 ⋅3247921.

It is a cyclic number.

It is not a de Polignac number, because 128235158911 - 2²⁷ = 128100941183 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 (128235158951) 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, 3768715 + ... + 3802588.

It is an arithmetic number, because the mean of its divisors is an integer number (32060686788).

Almost surely, 2^128235158911 is an apocalyptic number.

128235158911 is a deficient number, since it is larger than the sum of its proper divisors (7588241).

128235158911 is an equidigital number, since it uses as much as digits as its factorization.

128235158911 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7588240.

The product of its digits is 172800, while the sum is 46.

The spelling of 128235158911 in words is "one hundred twenty-eight billion, two hundred thirty-five million, one hundred fifty-eight thousand, nine hundred eleven".