109193898025 has 9 divisors (see below), whose sum is σ = 135402482341. Its totient is φ = 87353796640.

The previous prime is 109193898019. The next prime is 109193898043. The reversal of 109193898025 is 520898391901.

The square root of 109193898025 is 330445.

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 20148950809 + 89044947216 = 141947^2 + 298404^2 .

It is not a de Polignac number, because 109193898025 - 2¹¹ = 109193895977 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, 1619181 + ... + 1685269.

Almost surely, 2^109193898025 is an apocalyptic number.

109193898025 is the 330445-th square number.

109193898025 is the 165223-rd centered octagonal number.

It is an amenable number.

109193898025 is a deficient number, since it is larger than the sum of its proper divisors (26208584316).

109193898025 is an frugal number, since it uses more digits than its factorization.

109193898025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132188 (or 66094 counting only the distinct ones).

The product of its (nonzero) digits is 1399680, while the sum is 55.

The spelling of 109193898025 in words is "one hundred nine billion, one hundred ninety-three million, eight hundred ninety-eight thousand, twenty-five".