1816432025 has 6 divisors (see below), whose sum is σ = 2252375742. Its totient is φ = 1453145600.

The previous prime is 1816432021. The next prime is 1816432027. The reversal of 1816432025 is 5202346181.

It can be written as a sum of positive squares in 3 ways, for example, as 22401289 + 1794030736 = 4733^2 + 42356^2 .

It is not a de Polignac number, because 1816432025 - 2² = 1816432021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1816431982 and 1816432000.

It is not an unprimeable number, because it can be changed into a prime (1816432021) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 36328616 + ... + 36328665.

It is an arithmetic number, because the mean of its divisors is an integer number (375395957).

Almost surely, 2^1816432025 is an apocalyptic number.

It is an amenable number.

1816432025 is a deficient number, since it is larger than the sum of its proper divisors (435943717).

1816432025 is an equidigital number, since it uses as much as digits as its factorization.

1816432025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72657291 (or 72657286 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 32.

The square root of 1816432025 is about 42619.6201883593. The cubic root of 1816432025 is about 1220.1307807934.

The spelling of 1816432025 in words is "one billion, eight hundred sixteen million, four hundred thirty-two thousand, twenty-five".