5216481664461 has 12 divisors (see below), whose sum is σ = 7535010772380. Its totient is φ = 3477611606400.

The previous prime is 5216481664409. The next prime is 5216481664477. The reversal of 5216481664461 is 1644661846125.

5216481664461 is a `hidden beast` number, since 5 + 2 + 1 + 6 + 481 + 66 + 44 + 61 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 2078588276361 + 3137893388100 = 1441731^2 + 1771410^2 .

It is not a de Polignac number, because 5216481664461 - 2⁷ = 5216481664333 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 5216481664398 and 5216481664407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5216481664561) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2789490 + ... + 4267811.

It is an arithmetic number, because the mean of its divisors is an integer number (627917564365).

Almost surely, 2^{5216481664461} is an apocalyptic number.

It is an amenable number.

5216481664461 is a deficient number, since it is larger than the sum of its proper divisors (2318529107919).

5216481664461 is a wasteful number, since it uses less digits than its factorization.

5216481664461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7139436 (or 7139433 counting only the distinct ones).

The product of its digits is 6635520, while the sum is 54.

The spelling of 5216481664461 in words is "five trillion, two hundred sixteen billion, four hundred eighty-one million, six hundred sixty-four thousand, four hundred sixty-one".