13405504331421 has 64 divisors (see below), whose sum is σ = 20700965606400. Its totient is φ = 8563503513600.

The previous prime is 13405504331419. The next prime is 13405504331437. The reversal of 13405504331421 is 12413340550431.

13405504331421 is a `hidden beast` number, since 1 + 3 + 4 + 0 + 5 + 504 + 3 + 3 + 142 + 1 = 666.

It is not a de Polignac number, because 13405504331421 - 2¹ = 13405504331419 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13405504333421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 54410691 + ... + 54656511.

It is an arithmetic number, because the mean of its divisors is an integer number (323452587600).

Almost surely, 2^{13405504331421} is an apocalyptic number.

It is an amenable number.

13405504331421 is a deficient number, since it is larger than the sum of its proper divisors (7295461274979).

13405504331421 is a wasteful number, since it uses less digits than its factorization.

13405504331421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 246387 (or 246381 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 36.

Adding to 13405504331421 its reverse (12413340550431), we get a palindrome (25818844881852).

The spelling of 13405504331421 in words is "thirteen trillion, four hundred five billion, five hundred four million, three hundred thirty-one thousand, four hundred twenty-one".