128009249013 has 8 divisors (see below), whose sum is σ = 170681212576. Its totient is φ = 85338392400.

The previous prime is 128009249009. The next prime is 128009249023. The reversal of 128009249013 is 310942900821.

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

It is not a de Polignac number, because 128009249013 - 2² = 128009249009 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128009249023) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47298 + ... + 508188.

It is an arithmetic number, because the mean of its divisors is an integer number (21335151572).

Almost surely, 2^128009249013 is an apocalyptic number.

It is an amenable number.

128009249013 is a deficient number, since it is larger than the sum of its proper divisors (42671963563).

128009249013 is an equidigital number, since it uses as much as digits as its factorization.

128009249013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 553475.

The product of its (nonzero) digits is 31104, while the sum is 39.

The spelling of 128009249013 in words is "one hundred twenty-eight billion, nine million, two hundred forty-nine thousand, thirteen".