13406545521 has 16 divisors (see below), whose sum is σ = 20906894400. Its totient is φ = 8467291584.

The previous prime is 13406545513. The next prime is 13406545561. The reversal of 13406545521 is 12554560431.

13406545521 is a `hidden beast` number, since 1 + 3 + 40 + 65 + 4 + 552 + 1 = 666.

It is not a de Polignac number, because 13406545521 - 2³ = 13406545513 is a prime.

It is a super-2 number, since 2×13406545521² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (13406545561) 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 15 ways as a sum of consecutive naturals, for example, 13066296 + ... + 13067321.

It is an arithmetic number, because the mean of its divisors is an integer number (1306680900).

Almost surely, 2^13406545521 is an apocalyptic number.

It is an amenable number.

13406545521 is a deficient number, since it is larger than the sum of its proper divisors (7500348879).

13406545521 is a wasteful number, since it uses less digits than its factorization.

13406545521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26133645 (or 26133639 counting only the distinct ones).

The product of its (nonzero) digits is 72000, while the sum is 36.

The spelling of 13406545521 in words is "thirteen billion, four hundred six million, five hundred forty-five thousand, five hundred twenty-one".