13815326805 has 24 divisors (see below), whose sum is σ = 25713425952. Its totient is φ = 6315577632.

The previous prime is 13815326761. The next prime is 13815326821. The reversal of 13815326805 is 50862351831.

It is not a de Polignac number, because 13815326805 - 2⁶ = 13815326741 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9397447 + ... + 9398916.

It is an arithmetic number, because the mean of its divisors is an integer number (1071392748).

Almost surely, 2^13815326805 is an apocalyptic number.

13815326805 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

13815326805 is a deficient number, since it is larger than the sum of its proper divisors (11898099147).

13815326805 is a wasteful number, since it uses less digits than its factorization.

13815326805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18796385 (or 18796378 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 42.

The spelling of 13815326805 in words is "thirteen billion, eight hundred fifteen million, three hundred twenty-six thousand, eight hundred five".