13978805824 has 21 divisors (see below), whose sum is σ = 27741069867. Its totient is φ = 6988929984.

The previous prime is 13978805807. The next prime is 13978805873. The reversal of 13978805824 is 42850887931.

The square root of 13978805824 is 118232.

It is a perfect power (a square), and thus also a powerful number.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 938467 + ... + 953245.

It is an arithmetic number, because the mean of its divisors is an integer number (1321003327).

Almost surely, 2^13978805824 is an apocalyptic number.

13978805824 is the 118232-nd square number.

It is an amenable number.

13978805824 is a deficient number, since it is larger than the sum of its proper divisors (13762264043).

13978805824 is an frugal number, since it uses more digits than its factorization.

13978805824 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29570 (or 14781 counting only the distinct ones).

The product of its (nonzero) digits is 3870720, while the sum is 55.

The spelling of 13978805824 in words is "thirteen billion, nine hundred seventy-eight million, eight hundred five thousand, eight hundred twenty-four".