13661215112 has 16 divisors (see below), whose sum is σ = 25688601360. Its totient is φ = 6810921424.

The previous prime is 13661215081. The next prime is 13661215123. The reversal of 13661215112 is 21151216631.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2457818 + ... + 2463369.

It is an arithmetic number, because the mean of its divisors is an integer number (1605537585).

Almost surely, 2^13661215112 is an apocalyptic number.

It is an amenable number.

13661215112 is a deficient number, since it is larger than the sum of its proper divisors (12027386248).

13661215112 is a wasteful number, since it uses less digits than its factorization.

13661215112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4921540 (or 4921536 counting only the distinct ones).

The product of its digits is 2160, while the sum is 29.

The spelling of 13661215112 in words is "thirteen billion, six hundred sixty-one million, two hundred fifteen thousand, one hundred twelve".