5218904010681 has 24 divisors (see below), whose sum is σ = 7608081915720. Its totient is φ = 3447120499200.

The previous prime is 5218904010653. The next prime is 5218904010821. The reversal of 5218904010681 is 1860104098125.

It is a happy number.

5218904010681 is a `hidden beast` number, since 5 + 2 + 189 + 0 + 401 + 0 + 68 + 1 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 1906926237225 + 3311977773456 = 1380915^2 + 1819884^2 .

It is not a de Polignac number, because 5218904010681 - 2¹⁸ = 5218903748537 is a prime.

It is a super-2 number, since 2×5218904010681² (a number of 26 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (5218904010611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15292771 + ... + 15630311.

It is an arithmetic number, because the mean of its divisors is an integer number (317003413155).

Almost surely, 2^{5218904010681} is an apocalyptic number.

It is an amenable number.

5218904010681 is a deficient number, since it is larger than the sum of its proper divisors (2389177905039).

5218904010681 is a wasteful number, since it uses less digits than its factorization.

5218904010681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 353417 (or 353414 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 45.

The spelling of 5218904010681 in words is "five trillion, two hundred eighteen billion, nine hundred four million, ten thousand, six hundred eighty-one".