13661614418 has 8 divisors (see below), whose sum is σ = 20520380748. Its totient is φ = 6821487504.

The previous prime is 13661614391. The next prime is 13661614427. The reversal of 13661614418 is 81441616631.

13661614418 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 12673580929 + 988033489 = 112577^2 + 31433^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×13661614418² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 4658021 + ... + 4660952.

Almost surely, 2^13661614418 is an apocalyptic number.

13661614418 is a deficient number, since it is larger than the sum of its proper divisors (6858766330).

13661614418 is an equidigital number, since it uses as much as digits as its factorization.

13661614418 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9319708.

The product of its digits is 82944, while the sum is 41.

The spelling of 13661614418 in words is "thirteen billion, six hundred sixty-one million, six hundred fourteen thousand, four hundred eighteen".