13661817832 has 16 divisors (see below), whose sum is σ = 27586363140. Its totient is φ = 6305454336.

The previous prime is 13661817821. The next prime is 13661817833. The reversal of 13661817832 is 23871816631.

It can be written as a sum of positive squares in 2 ways, for example, as 11766608676 + 1895209156 = 108474^2 + 43534^2 .

It is not an unprimeable number, because it can be changed into a prime (13661817833) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 65681713 + ... + 65681920.

Almost surely, 2^13661817832 is an apocalyptic number.

It is an amenable number.

13661817832 is an abundant number, since it is smaller than the sum of its proper divisors (13924545308).

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

13661817832 is a wasteful number, since it uses less digits than its factorization.

13661817832 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131363652 (or 131363648 counting only the distinct ones).

The product of its digits is 290304, while the sum is 46.

The spelling of 13661817832 in words is "thirteen billion, six hundred sixty-one million, eight hundred seventeen thousand, eight hundred thirty-two".