128890015125 has 16 divisors (see below), whose sum is σ = 214472985792. Its totient is φ = 68741341200.

The previous prime is 128890015117. The next prime is 128890015153. The reversal of 128890015125 is 521510098821.

It is not a de Polignac number, because 128890015125 - 2³ = 128890015117 is a prime.

It is a super-2 number, since 2×128890015125² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 171852979 + ... + 171853728.

It is an arithmetic number, because the mean of its divisors is an integer number (13404561612).

Almost surely, 2^128890015125 is an apocalyptic number.

128890015125 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

128890015125 is a deficient number, since it is larger than the sum of its proper divisors (85582970667).

128890015125 is an equidigital number, since it uses as much as digits as its factorization.

128890015125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 343706725 (or 343706715 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 42.

The spelling of 128890015125 in words is "one hundred twenty-eight billion, eight hundred ninety million, fifteen thousand, one hundred twenty-five".