13584026978 has 4 divisors (see below), whose sum is σ = 20376040470. Its totient is φ = 6792013488.

The previous prime is 13584026959. The next prime is 13584027043. The reversal of 13584026978 is 87962048531.

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

It can be written as a sum of positive squares in only one way, i.e., 12668177809 + 915849169 = 112553^2 + 30263^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3396006743 + ... + 3396006746.

It is a 1-persistent number, because it is pandigital, but 2⋅13584026978 = 27168053956 is not.

Almost surely, 2^13584026978 is an apocalyptic number.

13584026978 is a deficient number, since it is larger than the sum of its proper divisors (6792013492).

13584026978 is an equidigital number, since it uses as much as digits as its factorization.

13584026978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6792013491.

The product of its (nonzero) digits is 2903040, while the sum is 53.

The spelling of 13584026978 in words is "thirteen billion, five hundred eighty-four million, twenty-six thousand, nine hundred seventy-eight".