128925576806656 has 108 divisors (see below), whose sum is σ = 303464334170172. Its totient is φ = 54496916619264.

The previous prime is 128925576806651. The next prime is 128925576806669. The reversal of 128925576806656 is 656608675529821.

It can be written as a sum of positive squares in 2 ways, for example, as 37215075373056 + 91710501433600 = 6100416^2 + 9576560^2 .

It is not an unprimeable number, because it can be changed into a prime (128925576806651) 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, 69480645 + ... + 71312068.

Almost surely, 2^{128925576806656} is an apocalyptic number.

128925576806656 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

128925576806656 is an abundant number, since it is smaller than the sum of its proper divisors (174538757363516).

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

128925576806656 is an equidigital number, since it uses as much as digits as its factorization.

128925576806656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140792816 (or 140792795 counting only the distinct ones).

The product of its (nonzero) digits is 2612736000, while the sum is 76.

The spelling of 128925576806656 in words is "one hundred twenty-eight trillion, nine hundred twenty-five billion, five hundred seventy-six million, eight hundred six thousand, six hundred fifty-six".