13993290644 has 12 divisors (see below), whose sum is σ = 24541846644. Its totient is φ = 6981334464.

The previous prime is 13993290637. The next prime is 13993290691. The reversal of 13993290644 is 44609239931.

It can be written as a sum of positive squares in 2 ways, for example, as 11753161744 + 2240128900 = 108412^2 + 47330^2 .

It is a junction number, because it is equal to n+sod(n) for n = 13993290592 and 13993290601.

It is a congruent 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 3 ways as a sum of consecutive naturals, for example, 3825659 + ... + 3829314.

It is an arithmetic number, because the mean of its divisors is an integer number (2045153887).

Almost surely, 2^13993290644 is an apocalyptic number.

It is an amenable number.

13993290644 is a deficient number, since it is larger than the sum of its proper divisors (10548556000).

13993290644 is a wasteful number, since it uses less digits than its factorization.

13993290644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7655434 (or 7655432 counting only the distinct ones).

The product of its (nonzero) digits is 1259712, while the sum is 50.

The spelling of 13993290644 in words is "thirteen billion, nine hundred ninety-three million, two hundred ninety thousand, six hundred forty-four".