128541573250 has 16 divisors (see below), whose sum is σ = 240629825592. Its totient is φ = 51416629200.

The previous prime is 128541573241. The next prime is 128541573263. The reversal of 128541573250 is 52375145821.

It can be written as a sum of positive squares in 4 ways, for example, as 40960497769 + 87581075481 = 202387^2 + 295941^2 .

It is a junction number, because it is equal to n+sod(n) for n = 128541573197 and 128541573206.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 257082897 + ... + 257083396.

Almost surely, 2^128541573250 is an apocalyptic number.

128541573250 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

128541573250 is a deficient number, since it is larger than the sum of its proper divisors (112088252342).

128541573250 is an equidigital number, since it uses as much as digits as its factorization.

128541573250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 514166310 (or 514166300 counting only the distinct ones).

The product of its (nonzero) digits is 336000, while the sum is 43.

The spelling of 128541573250 in words is "one hundred twenty-eight billion, five hundred forty-one million, five hundred seventy-three thousand, two hundred fifty".