13115263321644 has 72 divisors (see below), whose sum is σ = 33664415238384. Its totient is φ = 3971108803200.

The previous prime is 13115263321609. The next prime is 13115263321661. The reversal of 13115263321644 is 44612336251131.

13115263321644 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 13115263321596 and 13115263321605.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1854867 + ... + 5447114.

Almost surely, 2^{13115263321644} is an apocalyptic number.

It is an amenable number.

13115263321644 is an abundant number, since it is smaller than the sum of its proper divisors (20549151916740).

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

13115263321644 is a wasteful number, since it uses less digits than its factorization.

13115263321644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7303247 (or 7303234 counting only the distinct ones).

The product of its digits is 311040, while the sum is 42.

Adding to 13115263321644 its reverse (44612336251131), we get a palindrome (57727599572775).

The spelling of 13115263321644 in words is "thirteen trillion, one hundred fifteen billion, two hundred sixty-three million, three hundred twenty-one thousand, six hundred forty-four".