1812650841 has 6 divisors (see below), whose sum is σ = 2618273450. Its totient is φ = 1208433888.

The previous prime is 1812650837. The next prime is 1812650843. The reversal of 1812650841 is 1480562181.

It can be written as a sum of positive squares in only one way, i.e., 1490268816 + 322382025 = 38604^2 + 17955^2 .

It is not a de Polignac number, because 1812650841 - 2² = 1812650837 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1812650796 and 1812650805.

It is not an unprimeable number, because it can be changed into a prime (1812650843) 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, 100702816 + ... + 100702833.

Almost surely, 2^1812650841 is an apocalyptic number.

It is an amenable number.

1812650841 is a deficient number, since it is larger than the sum of its proper divisors (805622609).

1812650841 is a wasteful number, since it uses less digits than its factorization.

1812650841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 201405655 (or 201405652 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 36.

The square root of 1812650841 is about 42575.2374156622. The cubic root of 1812650841 is about 1219.2835623830.

It can be divided in two parts, 1812 and 650841, that added together give a triangular number (652653 = T₁₁₄₂).

The spelling of 1812650841 in words is "one billion, eight hundred twelve million, six hundred fifty thousand, eight hundred forty-one".