13220653145524 has 36 divisors (see below), whose sum is σ = 25446522237444. Its totient is φ = 6005633920000.

The previous prime is 13220653145473. The next prime is 13220653145527. The reversal of 13220653145524 is 42554135602231.

It can be written as a sum of positive squares in 2 ways, for example, as 10755382611600 + 2465270533924 = 3279540^2 + 1570118^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13220653145527) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7755847 + ... + 9305614.

It is an arithmetic number, because the mean of its divisors is an integer number (706847839929).

Almost surely, 2^{13220653145524} is an apocalyptic number.

It is an amenable number.

13220653145524 is a deficient number, since it is larger than the sum of its proper divisors (12225869091920).

13220653145524 is a wasteful number, since it uses less digits than its factorization.

13220653145524 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17063088 (or 17063075 counting only the distinct ones).

The product of its (nonzero) digits is 864000, while the sum is 43.

Adding to 13220653145524 its reverse (42554135602231), we get a palindrome (55774788747755).

The spelling of 13220653145524 in words is "thirteen trillion, two hundred twenty billion, six hundred fifty-three million, one hundred forty-five thousand, five hundred twenty-four".