1809630300625 has 45 divisors (see below), whose sum is σ = 2630850396669. Its totient is φ = 1240727922000.

The previous prime is 1809630300617. The next prime is 1809630300641. The reversal of 1809630300625 is 5260030369081.

The square root of 1809630300625 is 1345225.

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

It can be written as a sum of positive squares in 2 ways, for example, as 141875015569 + 1667755285056 = 376663^2 + 1291416^2 .

It is not a de Polignac number, because 1809630300625 - 2³ = 1809630300617 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 235410532 + ... + 235418218.

Almost surely, 2^{1809630300625} is an apocalyptic number.

1809630300625 is the 1345225-th square number.

1809630300625 is the 672613-rd centered octagonal number.

It is an amenable number.

1809630300625 is a deficient number, since it is larger than the sum of its proper divisors (821220096044).

1809630300625 is an frugal number, since it uses more digits than its factorization.

1809630300625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15408 (or 7699 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 43.

The spelling of 1809630300625 in words is "one trillion, eight hundred nine billion, six hundred thirty million, three hundred thousand, six hundred twenty-five".