1808052444225 has 18 divisors (see below), whose sum is σ = 3238422822726. Its totient is φ = 964294636800.

The previous prime is 1808052444217. The next prime is 1808052444229. The reversal of 1808052444225 is 5224442508081.

It is a happy number.

1808052444225 is a `hidden beast` number, since 1 + 8 + 0 + 80 + 524 + 4 + 42 + 2 + 5 = 666.

It can be written as a sum of positive squares in 3 ways, for example, as 349213629249 + 1458838814976 = 590943^2 + 1207824^2 .

It is not a de Polignac number, because 1808052444225 - 2³ = 1808052444217 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (1808052444229) 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 17 ways as a sum of consecutive naturals, for example, 4017894096 + ... + 4017894545.

Almost surely, 2^{1808052444225} is an apocalyptic number.

1808052444225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1808052444225 is a deficient number, since it is larger than the sum of its proper divisors (1430370378501).

1808052444225 is a wasteful number, since it uses less digits than its factorization.

1808052444225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8035788657 (or 8035788649 counting only the distinct ones).

The product of its (nonzero) digits is 819200, while the sum is 45.

The spelling of 1808052444225 in words is "one trillion, eight hundred eight billion, fifty-two million, four hundred forty-four thousand, two hundred twenty-five".