5207509965421 has 16 divisors (see below), whose sum is σ = 5648899698288. Its totient is φ = 4781152153600.

The previous prime is 5207509965341. The next prime is 5207509965461. The reversal of 5207509965421 is 1245699057025.

5207509965421 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 8 ways, for example, as 2222085321 + 5205287880100 = 47139^2 + 2281510^2 .

It is a cyclic number.

It is not a de Polignac number, because 5207509965421 - 2²⁹ = 5206973094509 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5207509965461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6473691 + ... + 7233511.

It is an arithmetic number, because the mean of its divisors is an integer number (353056231143).

Almost surely, 2^{5207509965421} is an apocalyptic number.

It is an amenable number.

5207509965421 is a deficient number, since it is larger than the sum of its proper divisors (441389732867).

5207509965421 is a wasteful number, since it uses less digits than its factorization.

5207509965421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 769712.

The product of its (nonzero) digits is 6804000, while the sum is 55.

The spelling of 5207509965421 in words is "five trillion, two hundred seven billion, five hundred nine million, nine hundred sixty-five thousand, four hundred twenty-one".