13661342036 has 12 divisors (see below), whose sum is σ = 23908199700. Its totient is φ = 6830427840.

The previous prime is 13661342033. The next prime is 13661342111. The reversal of 13661342036 is 63024316631.

It can be written as a sum of positive squares in 2 ways, for example, as 4436892100 + 9224449936 = 66610^2 + 96044^2 .

It is a junction number, because it is equal to n+sod(n) for n = 13661341987 and 13661342005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13661342033) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 137390 + ... + 214938.

It is an arithmetic number, because the mean of its divisors is an integer number (1992349975).

Almost surely, 2^13661342036 is an apocalyptic number.

It is an amenable number.

13661342036 is a deficient number, since it is larger than the sum of its proper divisors (10246857664).

13661342036 is a wasteful number, since it uses less digits than its factorization.

13661342036 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121594 (or 121592 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 35.

Adding to 13661342036 its reverse (63024316631), we get a palindrome (76685658667).

The spelling of 13661342036 in words is "thirteen billion, six hundred sixty-one million, three hundred forty-two thousand, thirty-six".