128570539821025 has 27 divisors (see below), whose sum is σ = 159639991372953. Its totient is φ = 102719503360800.

The previous prime is 128570539821019. The next prime is 128570539821041. The reversal of 128570539821025 is 520128935075821.

It is a happy number.

The square root of 128570539821025 is 11338895.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 2556983289249 + 126013556531776 = 1599057^2 + 11225576^2 .

It is not a de Polignac number, because 128570539821025 - 2¹¹ = 128570539818977 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 79315569715 + ... + 79315571335.

Almost surely, 2^{128570539821025} is an apocalyptic number.

128570539821025 is the 11338895-th square number.

128570539821025 is the 5669448-th centered octagonal number.

It is an amenable number.

128570539821025 is a deficient number, since it is larger than the sum of its proper divisors (31069451551928).

128570539821025 is an frugal number, since it uses more digits than its factorization.

128570539821025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6050 (or 3025 counting only the distinct ones).

The product of its (nonzero) digits is 12096000, while the sum is 58.

The spelling of 128570539821025 in words is "one hundred twenty-eight trillion, five hundred seventy billion, five hundred thirty-nine million, eight hundred twenty-one thousand, twenty-five".