128136861039 has 8 divisors (see below), whose sum is σ = 186380888832. Its totient is φ = 77658703640.

The previous prime is 128136861001. The next prime is 128136861067. The reversal of 128136861039 is 930168631821.

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 128136861039 - 2¹² = 128136856943 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128136861439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1941467559 + ... + 1941467624.

It is an arithmetic number, because the mean of its divisors is an integer number (23297611104).

Almost surely, 2^128136861039 is an apocalyptic number.

128136861039 is a deficient number, since it is larger than the sum of its proper divisors (58244027793).

128136861039 is a wasteful number, since it uses less digits than its factorization.

128136861039 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3882935197.

The product of its (nonzero) digits is 373248, while the sum is 48.

The spelling of 128136861039 in words is "one hundred twenty-eight billion, one hundred thirty-six million, eight hundred sixty-one thousand, thirty-nine".