13819975978 has 8 divisors (see below), whose sum is σ = 20923702272. Its totient is φ = 6845408556.

The previous prime is 13819975957. The next prime is 13819975997. The reversal of 13819975978 is 87957991831.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32289450 + ... + 32289877.

It is an arithmetic number, because the mean of its divisors is an integer number (2615462784).

Almost surely, 2^13819975978 is an apocalyptic number.

13819975978 is a deficient number, since it is larger than the sum of its proper divisors (7103726294).

13819975978 is a wasteful number, since it uses less digits than its factorization.

13819975978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64579436.

The product of its digits is 34292160, while the sum is 67.

The spelling of 13819975978 in words is "thirteen billion, eight hundred nineteen million, nine hundred seventy-five thousand, nine hundred seventy-eight".