1815680013 has 16 divisors (see below), whose sum is σ = 2856001536. Its totient is φ = 1004062320.

The previous prime is 1815679997. The next prime is 1815680051. The reversal of 1815680013 is 3100865181.

It is not a de Polignac number, because 1815680013 - 2⁴ = 1815679997 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1815680063) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1393881 + ... + 1395182.

It is an arithmetic number, because the mean of its divisors is an integer number (178500096).

Almost surely, 2^1815680013 is an apocalyptic number.

It is an amenable number.

1815680013 is a deficient number, since it is larger than the sum of its proper divisors (1040321523).

1815680013 is a wasteful number, since it uses less digits than its factorization.

1815680013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2789104.

The product of its (nonzero) digits is 5760, while the sum is 33.

The square root of 1815680013 is about 42610.7969064180. The cubic root of 1815680013 is about 1219.9623774567.

The spelling of 1815680013 in words is "one billion, eight hundred fifteen million, six hundred eighty thousand, thirteen".