13405050514521 has 12 divisors (see below), whose sum is σ = 19554562138020. Its totient is φ = 8848218160800.

The previous prime is 13405050514463. The next prime is 13405050514577. The reversal of 13405050514521 is 12541505050431.

13405050514521 is a `hidden beast` number, since 1 + 3 + 4 + 0 + 5 + 0 + 505 + 145 + 2 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 9657109392921 + 3747941121600 = 3107589^2 + 1935960^2 .

It is not a de Polignac number, because 13405050514521 - 2¹³ = 13405050506329 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13405050414521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7373514226 + ... + 7373516043.

It is an arithmetic number, because the mean of its divisors is an integer number (1629546844835).

Almost surely, 2^{13405050514521} is an apocalyptic number.

It is an amenable number.

13405050514521 is a deficient number, since it is larger than the sum of its proper divisors (6149511623499).

13405050514521 is a wasteful number, since it uses less digits than its factorization.

13405050514521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14747030376 (or 14747030373 counting only the distinct ones).

The product of its (nonzero) digits is 60000, while the sum is 36.

Adding to 13405050514521 its reverse (12541505050431), we get a palindrome (25946555564952).

The spelling of 13405050514521 in words is "thirteen trillion, four hundred five billion, fifty million, five hundred fourteen thousand, five hundred twenty-one".