1808606225 has 12 divisors (see below), whose sum is σ = 2265795084. Its totient is φ = 1431966720.

The previous prime is 1808606221. The next prime is 1808606231. The reversal of 1808606225 is 5226068081.

It can be written as a sum of positive squares in 6 ways, for example, as 93238336 + 1715367889 = 9656^2 + 41417^2 .

It is not a de Polignac number, because 1808606225 - 2² = 1808606221 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1808606221) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 370484 + ... + 375333.

It is an arithmetic number, because the mean of its divisors is an integer number (188816257).

Almost surely, 2^1808606225 is an apocalyptic number.

It is an amenable number.

1808606225 is a deficient number, since it is larger than the sum of its proper divisors (457188859).

1808606225 is an equidigital number, since it uses as much as digits as its factorization.

1808606225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 745924 (or 745919 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 38.

The square root of 1808606225 is about 42527.7112598362. The cubic root of 1808606225 is about 1218.3760137621.

The spelling of 1808606225 in words is "one billion, eight hundred eight million, six hundred six thousand, two hundred twenty-five".