128252538867 has 8 divisors (see below), whose sum is σ = 171008844496. Its totient is φ = 85498962912.

The previous prime is 128252538853. The next prime is 128252538893. The reversal of 128252538867 is 768835252821.

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

It is a de Polignac number, because none of the positive numbers 2^k-128252538867 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (128252538467) 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, 570148 + ... + 762609.

It is an arithmetic number, because the mean of its divisors is an integer number (21376105562).

Almost surely, 2^128252538867 is an apocalyptic number.

128252538867 is a deficient number, since it is larger than the sum of its proper divisors (42756305629).

128252538867 is a wasteful number, since it uses less digits than its factorization.

128252538867 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1364837.

The product of its digits is 12902400, while the sum is 57.

The spelling of 128252538867 in words is "one hundred twenty-eight billion, two hundred fifty-two million, five hundred thirty-eight thousand, eight hundred sixty-seven".