14781678639 has 64 divisors (see below), whose sum is σ = 24874214400. Its totient is φ = 7758495360.

The previous prime is 14781678607. The next prime is 14781678643. The reversal of 14781678639 is 93687618741.

It is not a de Polignac number, because 14781678639 - 2⁵ = 14781678607 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (14781678649) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2819929 + ... + 2825165.

It is an arithmetic number, because the mean of its divisors is an integer number (388659600).

Almost surely, 2^14781678639 is an apocalyptic number.

14781678639 is a deficient number, since it is larger than the sum of its proper divisors (10092535761).

14781678639 is a wasteful number, since it uses less digits than its factorization.

14781678639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5485 (or 5471 counting only the distinct ones).

The product of its digits is 12192768, while the sum is 60.

The spelling of 14781678639 in words is "fourteen billion, seven hundred eighty-one million, six hundred seventy-eight thousand, six hundred thirty-nine".