128280886806225 has 24 divisors (see below), whose sum is σ = 217264019025312. Its totient is φ = 66747778499200.

The previous prime is 128280886806173. The next prime is 128280886806227. The reversal of 128280886806225 is 522608688082821.

It is not a de Polignac number, because 128280886806225 - 2¹⁹ = 128280886281937 is a prime.

It is a super-2 number, since 2×128280886806225² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (128280886806227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 20858677707 + ... + 20858683856.

It is an arithmetic number, because the mean of its divisors is an integer number (9052667459388).

Almost surely, 2^{128280886806225} is an apocalyptic number.

128280886806225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

128280886806225 is a deficient number, since it is larger than the sum of its proper divisors (88983132219087).

128280886806225 is a wasteful number, since it uses less digits than its factorization.

128280886806225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41717361617 (or 41717361612 counting only the distinct ones).

The product of its (nonzero) digits is 94371840, while the sum is 66.

The spelling of 128280886806225 in words is "one hundred twenty-eight trillion, two hundred eighty billion, eight hundred eighty-six million, eight hundred six thousand, two hundred twenty-five".