13558681394 has 8 divisors (see below), whose sum is σ = 20350589040. Its totient is φ = 6775151716.

The previous prime is 13558681379. The next prime is 13558681397. The reversal of 13558681394 is 49318685531.

It is a happy number.

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

It is a super-2 number, since 2×13558681394² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (13558681397) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2090444 + ... + 2096919.

It is an arithmetic number, because the mean of its divisors is an integer number (2543823630).

Almost surely, 2^13558681394 is an apocalyptic number.

13558681394 is a deficient number, since it is larger than the sum of its proper divisors (6791907646).

13558681394 is a wasteful number, since it uses less digits than its factorization.

13558681394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4188984.

The product of its digits is 3110400, while the sum is 53.

The spelling of 13558681394 in words is "thirteen billion, five hundred fifty-eight million, six hundred eighty-one thousand, three hundred ninety-four".