136128081 has 8 divisors (see below), whose sum is σ = 183543840. Its totient is φ = 89732192.

The previous prime is 136128073. The next prime is 136128101. The reversal of 136128081 is 180821631.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 136128081 - 2³ = 136128073 is a prime.

It is a super-2 number, since 2×136128081² = 37061708873485122, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (136128071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 254655 + ... + 255188.

It is an arithmetic number, because the mean of its divisors is an integer number (22942980).

Almost surely, 2^136128081 is an apocalyptic number.

It is an amenable number.

136128081 is a deficient number, since it is larger than the sum of its proper divisors (47415759).

136128081 is an equidigital number, since it uses as much as digits as its factorization.

136128081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 509935.

The product of its (nonzero) digits is 2304, while the sum is 30.

The square root of 136128081 is about 11667.3939249517. The cubic root of 136128081 is about 514.4177048896.

The spelling of 136128081 in words is "one hundred thirty-six million, one hundred twenty-eight thousand, eighty-one".