13506681644 has 24 divisors (see below), whose sum is σ = 24677872128. Its totient is φ = 6456182480.

The previous prime is 13506681631. The next prime is 13506681659. The reversal of 13506681644 is 44618660531.

13506681644 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 13506681595 and 13506681604.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 132899 + ... + 211365.

It is an arithmetic number, because the mean of its divisors is an integer number (1028244672).

Almost surely, 2^13506681644 is an apocalyptic number.

It is an amenable number.

13506681644 is a deficient number, since it is larger than the sum of its proper divisors (11171190484).

13506681644 is a wasteful number, since it uses less digits than its factorization.

13506681644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80365 (or 80363 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 44.

The spelling of 13506681644 in words is "thirteen billion, five hundred six million, six hundred eighty-one thousand, six hundred forty-four".