128331258947 has 4 divisors (see below), whose sum is σ = 128367939000. Its totient is φ = 128294578896.

The previous prime is 128331258941. The next prime is 128331258967. The reversal of 128331258947 is 749852133821.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 128331258947 - 2¹⁴ = 128331242563 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (128331258941) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18334778 + ... + 18341775.

It is an arithmetic number, because the mean of its divisors is an integer number (32091984750).

Almost surely, 2^128331258947 is an apocalyptic number.

128331258947 is a deficient number, since it is larger than the sum of its proper divisors (36680053).

128331258947 is an equidigital number, since it uses as much as digits as its factorization.

128331258947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36680052.

The product of its digits is 2903040, while the sum is 53.

The spelling of 128331258947 in words is "one hundred twenty-eight billion, three hundred thirty-one million, two hundred fifty-eight thousand, nine hundred forty-seven".