128131956001 has 8 divisors (see below), whose sum is σ = 146448311040. Its totient is φ = 109818548448.

The previous prime is 128131955999. The next prime is 128131956013. The reversal of 128131956001 is 100659131821.

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

It is not a de Polignac number, because 128131956001 - 2¹ = 128131955999 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (128131956031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 642916 + ... + 818293.

It is an arithmetic number, because the mean of its divisors is an integer number (18306038880).

Almost surely, 2^128131956001 is an apocalyptic number.

It is an amenable number.

128131956001 is a deficient number, since it is larger than the sum of its proper divisors (18316355039).

128131956001 is a wasteful number, since it uses less digits than its factorization.

128131956001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1473743.

The product of its (nonzero) digits is 12960, while the sum is 37.

The spelling of 128131956001 in words is "one hundred twenty-eight billion, one hundred thirty-one million, nine hundred fifty-six thousand, one".