128825139258 has 24 divisors (see below), whose sum is σ = 289458955968. Its totient is φ = 42941712924.

The previous prime is 128825139229. The next prime is 128825139259. The reversal of 128825139258 is 852931528821.

128825139258 is a `hidden beast` number, since 1 + 28 + 82 + 513 + 9 + 25 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (128825139259) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 132535666 + ... + 132536637.

It is an arithmetic number, because the mean of its divisors is an integer number (12060789832).

Almost surely, 2^128825139258 is an apocalyptic number.

128825139258 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

128825139258 is an abundant number, since it is smaller than the sum of its proper divisors (160633816710).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

128825139258 is an equidigital number, since it uses as much as digits as its factorization.

128825139258 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 265072320 (or 265072308 counting only the distinct ones).

The product of its digits is 2764800, while the sum is 54.

The spelling of 128825139258 in words is "one hundred twenty-eight billion, eight hundred twenty-five million, one hundred thirty-nine thousand, two hundred fifty-eight".