13533421455 has 96 divisors (see below), whose sum is σ = 25560909504. Its totient is φ = 6598361088.

The previous prime is 13533421427. The next prime is 13533421459. The reversal of 13533421455 is 55412433531.

13533421455 is a `hidden beast` number, since 135 + 33 + 42 + 1 + 455 = 666.

It is not a de Polignac number, because 13533421455 - 2⁸ = 13533421199 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13533421459) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 3739807 + ... + 3743423.

It is an arithmetic number, because the mean of its divisors is an integer number (266259474).

Almost surely, 2^13533421455 is an apocalyptic number.

13533421455 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

13533421455 is a deficient number, since it is larger than the sum of its proper divisors (12027488049).

13533421455 is a wasteful number, since it uses less digits than its factorization.

13533421455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3785 (or 3782 counting only the distinct ones).

The product of its digits is 108000, while the sum is 36.

Adding to 13533421455 its reverse (55412433531), we get a palindrome (68945854986).

The spelling of 13533421455 in words is "thirteen billion, five hundred thirty-three million, four hundred twenty-one thousand, four hundred fifty-five".