25200610009 has 3 divisors (see below), whose sum is σ = 25200768757. Its totient is φ = 25200451262.

The previous prime is 25200609953. The next prime is 25200610027. The reversal of 25200610009 is 90001600252.

The square root of 25200610009 is 158747.

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

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 25200610009 - 2⁷ = 25200609881 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25200620009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 79374 + ... + 238120.

Almost surely, 2^25200610009 is an apocalyptic number.

25200610009 is the 158747-th square number.

25200610009 is the 79374-th centered octagonal number.

It is an amenable number.

25200610009 is a deficient number, since it is larger than the sum of its proper divisors (158748).

25200610009 is an frugal number, since it uses more digits than its factorization.

25200610009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 317494 (or 158747 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 25.

Multiplying 25200610009 by its sum of digits (25), we get a square (630015250225 = 793735²).

It can be divided in two parts, 25200 and 610009, that added together give a square (635209 = 797²).

The spelling of 25200610009 in words is "twenty-five billion, two hundred million, six hundred ten thousand, nine".