13424425553521 has 8 divisors (see below), whose sum is σ = 13432318497000. Its totient is φ = 13416533644800.

The previous prime is 13424425553503. The next prime is 13424425553557. The reversal of 13424425553521 is 12535552442431.

It can be written as a sum of positive squares in 4 ways, for example, as 863858713600 + 12560566839921 = 929440^2 + 3544089^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 13424425553521 - 2³¹ = 13422278069873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13424425553501) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26506971 + ... + 27008671.

It is an arithmetic number, because the mean of its divisors is an integer number (1679039812125).

Almost surely, 2^{13424425553521} is an apocalyptic number.

It is an amenable number.

13424425553521 is a deficient number, since it is larger than the sum of its proper divisors (7892943479).

13424425553521 is a wasteful number, since it uses less digits than its factorization.

13424425553521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 517379.

The product of its digits is 2880000, while the sum is 46.

Adding to 13424425553521 its reverse (12535552442431), we get a palindrome (25959977995952).

The spelling of 13424425553521 in words is "thirteen trillion, four hundred twenty-four billion, four hundred twenty-five million, five hundred fifty-three thousand, five hundred twenty-one".