1811839345 has 16 divisors (see below), whose sum is σ = 2303849088. Its totient is φ = 1363173120.

The previous prime is 1811839339. The next prime is 1811839391. The reversal of 1811839345 is 5439381181.

It is not a de Polignac number, because 1811839345 - 2⁵ = 1811839313 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 115630 + ... + 130360.

It is an arithmetic number, because the mean of its divisors is an integer number (143990568).

Almost surely, 2^1811839345 is an apocalyptic number.

It is an amenable number.

1811839345 is a deficient number, since it is larger than the sum of its proper divisors (492009743).

1811839345 is a wasteful number, since it uses less digits than its factorization.

1811839345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16200.

The product of its digits is 103680, while the sum is 43.

The square root of 1811839345 is about 42565.7062081672. The cubic root of 1811839345 is about 1219.1015837027.

The spelling of 1811839345 in words is "one billion, eight hundred eleven million, eight hundred thirty-nine thousand, three hundred forty-five".