13406733681 has 16 divisors (see below), whose sum is σ = 20647804608. Its totient is φ = 7647334400.

The previous prime is 13406733569. The next prime is 13406733737. The reversal of 13406733681 is 18633760431.

It is a happy number.

13406733681 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 13406733681 - 2¹¹ = 13406731633 is a prime.

It is a super-2 number, since 2×13406733681² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (13406733181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11948400 + ... + 11949521.

It is an arithmetic number, because the mean of its divisors is an integer number (1290487788).

Almost surely, 2^13406733681 is an apocalyptic number.

13406733681 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

13406733681 is a deficient number, since it is larger than the sum of its proper divisors (7241070927).

13406733681 is a wasteful number, since it uses less digits than its factorization.

13406733681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23897952.

The product of its (nonzero) digits is 217728, while the sum is 42.

The spelling of 13406733681 in words is "thirteen billion, four hundred six million, seven hundred thirty-three thousand, six hundred eighty-one".