128158711 has 4 divisors (see below), whose sum is σ = 128189032. Its totient is φ = 128128392.

The previous prime is 128158703. The next prime is 128158721. The reversal of 128158711 is 117851821.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 117851821 = 1663 ⋅70867.

It is a cyclic number.

It is not a de Polignac number, because 128158711 - 2³ = 128158703 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 (128158721) 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, 7545 + ... + 17698.

It is an arithmetic number, because the mean of its divisors is an integer number (32047258).

Almost surely, 2^128158711 is an apocalyptic number.

128158711 is a deficient number, since it is larger than the sum of its proper divisors (30321).

128158711 is an equidigital number, since it uses as much as digits as its factorization.

128158711 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30320.

The product of its digits is 4480, while the sum is 34.

The square root of 128158711 is about 11320.7204276053. The cubic root of 128158711 is about 504.1766290619.

The spelling of 128158711 in words is "one hundred twenty-eight million, one hundred fifty-eight thousand, seven hundred eleven".