13806540481 has 4 divisors (see below), whose sum is σ = 13933206100. Its totient is φ = 13679874864.

The previous prime is 13806540421. The next prime is 13806540511. The reversal of 13806540481 is 18404560831.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4354812081 + 9451728400 = 65991^2 + 97220^2 .

It is a cyclic number.

It is not a de Polignac number, because 13806540481 - 2⁷ = 13806540353 is a prime.

It is a super-2 number, since 2×13806540481² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13806540421) 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 3 ways as a sum of consecutive naturals, for example, 63332646 + ... + 63332863.

It is an arithmetic number, because the mean of its divisors is an integer number (3483301525).

Almost surely, 2^13806540481 is an apocalyptic number.

It is an amenable number.

13806540481 is a deficient number, since it is larger than the sum of its proper divisors (126665619).

13806540481 is a wasteful number, since it uses less digits than its factorization.

13806540481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126665618.

The product of its (nonzero) digits is 92160, while the sum is 40.

The spelling of 13806540481 in words is "thirteen billion, eight hundred six million, five hundred forty thousand, four hundred eighty-one".