5206412109581 has 8 divisors (see below), whose sum is σ = 5216327491320. Its totient is φ = 5196501361152.

The previous prime is 5206412109551. The next prime is 5206412109583. The reversal of 5206412109581 is 1859012146025.

It can be written as a sum of positive squares in 4 ways, for example, as 1520434497481 + 3685977612100 = 1233059^2 + 1919890^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 5206412109581 - 2¹⁸ = 5206411847437 is a prime.

It is a super-2 number, since 2×5206412109581² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5206412109583) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1095365 + ... + 3407733.

It is an arithmetic number, because the mean of its divisors is an integer number (652040936415).

Almost surely, 2^{5206412109581} is an apocalyptic number.

It is an amenable number.

5206412109581 is a deficient number, since it is larger than the sum of its proper divisors (9915381739).

5206412109581 is a wasteful number, since it uses less digits than its factorization.

5206412109581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2316655.

The product of its (nonzero) digits is 172800, while the sum is 44.

The spelling of 5206412109581 in words is "five trillion, two hundred six billion, four hundred twelve million, one hundred nine thousand, five hundred eighty-one".