13181370636 has 48 divisors (see below), whose sum is σ = 35867686400. Its totient is φ = 3766104720.

The previous prime is 13181370617. The next prime is 13181370659. The reversal of 13181370636 is 63607318131.

It is a junction number, because it is equal to n+sod(n) for n = 13181370594 and 13181370603.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1597120 + ... + 1605351.

Almost surely, 2^13181370636 is an apocalyptic number.

It is an amenable number.

13181370636 is an abundant number, since it is smaller than the sum of its proper divisors (22686315764).

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

13181370636 is a wasteful number, since it uses less digits than its factorization.

13181370636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3202499 (or 3202483 counting only the distinct ones).

The product of its (nonzero) digits is 54432, while the sum is 39.

Adding to 13181370636 its reverse (63607318131), we get a palindrome (76788688767).

The spelling of 13181370636 in words is "thirteen billion, one hundred eighty-one million, three hundred seventy thousand, six hundred thirty-six".