521461324047447 has 18 divisors (see below), whose sum is σ = 876196918638288. Its totient is φ = 297977899455432.

The previous prime is 521461324047431. The next prime is 521461324047449. The reversal of 521461324047447 is 744740423164125.

521461324047447 is a `hidden beast` number, since 5 + 2 + 1 + 4 + 61 + 32 + 40 + 474 + 47 = 666.

It is not a de Polignac number, because 521461324047447 - 2⁴ = 521461324047431 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 521461324047393 and 521461324047402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (521461324047449) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 591225990543 + ... + 591225991424.

It is an arithmetic number, because the mean of its divisors is an integer number (48677606591016).

Almost surely, 2^{521461324047447} is an apocalyptic number.

521461324047447 is a deficient number, since it is larger than the sum of its proper divisors (354735594590841).

521461324047447 is a wasteful number, since it uses less digits than its factorization.

521461324047447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1182451981987 (or 1182451981977 counting only the distinct ones).

The product of its (nonzero) digits is 18063360, while the sum is 54.

The spelling of 521461324047447 in words is "five hundred twenty-one trillion, four hundred sixty-one billion, three hundred twenty-four million, forty-seven thousand, four hundred forty-seven".