14113688978 has 4 divisors (see below), whose sum is σ = 21170533470. Its totient is φ = 7056844488.

The previous prime is 14113688957. The next prime is 14113689001. The reversal of 14113688978 is 87988631141.

It is a happy number.

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., 11305430929 + 2808258049 = 106327^2 + 52993^2 .

It is a super-3 number, since 3×14113688978³ (a number of 31 digits) contains 333 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3528422243 + ... + 3528422246.

Almost surely, 2^14113688978 is an apocalyptic number.

14113688978 is a deficient number, since it is larger than the sum of its proper divisors (7056844492).

14113688978 is an equidigital number, since it uses as much as digits as its factorization.

14113688978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7056844491.

The product of its digits is 2322432, while the sum is 56.

The spelling of 14113688978 in words is "fourteen billion, one hundred thirteen million, six hundred eighty-eight thousand, nine hundred seventy-eight".