129056970025 has 9 divisors (see below), whose sum is σ = 160032870181. Its totient is φ = 103244139040.

The previous prime is 129056970017. The next prime is 129056970043. The reversal of 129056970025 is 520079650921.

The square root of 129056970025 is 359245.

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 41892674329 + 87164295696 = 204677^2 + 295236^2 .

It is not a de Polignac number, because 129056970025 - 2³ = 129056970017 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1760301 + ... + 1832149.

Almost surely, 2^129056970025 is an apocalyptic number.

129056970025 is the 359245-th square number.

129056970025 is the 179623-rd centered octagonal number.

It is an amenable number.

129056970025 is a deficient number, since it is larger than the sum of its proper divisors (30975900156).

129056970025 is an frugal number, since it uses more digits than its factorization.

129056970025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143708 (or 71854 counting only the distinct ones).

The product of its (nonzero) digits is 340200, while the sum is 46.

The spelling of 129056970025 in words is "one hundred twenty-nine billion, fifty-six million, nine hundred seventy thousand, twenty-five".