128071611 has 10 divisors (see below), whose sum is σ = 191316972. Its totient is φ = 85381020.

The previous prime is 128071597. The next prime is 128071631. The reversal of 128071611 is 116170821.

It is not a de Polignac number, because 128071611 - 2⁵ = 128071579 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (128071631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 790485 + ... + 790646.

Almost surely, 2^128071611 is an apocalyptic number.

128071611 is a deficient number, since it is larger than the sum of its proper divisors (63245361).

128071611 is an equidigital number, since it uses as much as digits as its factorization.

128071611 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1581143 (or 1581134 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 27.

The square root of 128071611 is about 11316.8728454463. The cubic root of 128071611 is about 504.0623859849.

The spelling of 128071611 in words is "one hundred twenty-eight million, seventy-one thousand, six hundred eleven".