13546639968 has 48 divisors (see below), whose sum is σ = 35566755840. Its totient is φ = 4514679936.

The previous prime is 13546639949. The next prime is 13546640033. The reversal of 13546639968 is 86993664531.

It is a tau number, because it is divible by the number of its divisors (48).

It is a super-2 number, since 2×13546639968² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 665721 + ... + 685767.

It is an arithmetic number, because the mean of its divisors is an integer number (740974080).

Almost surely, 2^13546639968 is an apocalyptic number.

It is an amenable number.

13546639968 is an abundant number, since it is smaller than the sum of its proper divisors (22020115872).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13546639968 is a wasteful number, since it uses less digits than its factorization.

13546639968 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27099 (or 27091 counting only the distinct ones).

The product of its digits is 25194240, while the sum is 60.

It can be divided in two parts, 1354663 and 9968, that added together give a palindrome (1364631).

The spelling of 13546639968 in words is "thirteen billion, five hundred forty-six million, six hundred thirty-nine thousand, nine hundred sixty-eight".