1813802815 has 16 divisors (see below), whose sum is σ = 2380129920. Its totient is φ = 1315964320.

The previous prime is 1813802797. The next prime is 1813802819. The reversal of 1813802815 is 5182083181.

It is not a de Polignac number, because 1813802815 - 2⁷ = 1813802687 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1813802819) 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 15 ways as a sum of consecutive naturals, for example, 16309 + ... + 62398.

It is an arithmetic number, because the mean of its divisors is an integer number (148758120).

Almost surely, 2^1813802815 is an apocalyptic number.

1813802815 is a deficient number, since it is larger than the sum of its proper divisors (566327105).

1813802815 is a wasteful number, since it uses less digits than its factorization.

1813802815 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79142.

The product of its (nonzero) digits is 15360, while the sum is 37.

The square root of 1813802815 is about 42588.7639524793. The cubic root of 1813802815 is about 1219.5418002979.

Adding to 1813802815 its reverse (5182083181), we get a palindrome (6995885996).

The spelling of 1813802815 in words is "one billion, eight hundred thirteen million, eight hundred two thousand, eight hundred fifteen".