806338721913 has 16 divisors (see below), whose sum is σ = 1086331335936. Its totient is φ = 531953948160.

The previous prime is 806338721911. The next prime is 806338721921. The reversal of 806338721913 is 319127833608.

It is not a de Polignac number, because 806338721913 - 2¹ = 806338721911 is a prime.

It is not an unprimeable number, because it can be changed into a prime (806338721911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2348623 + ... + 2669963.

It is an arithmetic number, because the mean of its divisors is an integer number (67895708496).

Almost surely, 2^806338721913 is an apocalyptic number.

It is an amenable number.

806338721913 is a deficient number, since it is larger than the sum of its proper divisors (279992614023).

806338721913 is a wasteful number, since it uses less digits than its factorization.

806338721913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 330064.

The product of its (nonzero) digits is 1306368, while the sum is 51.

It can be divided in two parts, 806338 and 721913, that added together give a palindrome (1528251).

The spelling of 806338721913 in words is "eight hundred six billion, three hundred thirty-eight million, seven hundred twenty-one thousand, nine hundred thirteen".