13566778458 has 8 divisors (see below), whose sum is σ = 27133556928. Its totient is φ = 4522259484.

The previous prime is 13566778453. The next prime is 13566778471. The reversal of 13566778458 is 85487766531.

13566778458 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

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

13566778458 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (13566778451) 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, 1130564866 + ... + 1130564877.

It is an arithmetic number, because the mean of its divisors is an integer number (3391694616).

Almost surely, 2^13566778458 is an apocalyptic number.

13566778458 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13566778458 is a wasteful number, since it uses less digits than its factorization.

13566778458 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2261129748.

The product of its digits is 33868800, while the sum is 60.

The spelling of 13566778458 in words is "thirteen billion, five hundred sixty-six million, seven hundred seventy-eight thousand, four hundred fifty-eight".