540581209817 has 32 divisors (see below), whose sum is σ = 613988294400. Its totient is φ = 471446214400.

The previous prime is 540581209807. The next prime is 540581209871. The reversal of 540581209817 is 718902185045.

It is a cyclic number.

It is not a de Polignac number, because 540581209817 - 2¹⁰ = 540581208793 is a prime.

It is a super-2 number, since 2×540581209817² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (540581209807) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 31440659 + ... + 31457847.

It is an arithmetic number, because the mean of its divisors is an integer number (19187134200).

Almost surely, 2^540581209817 is an apocalyptic number.

It is an amenable number.

540581209817 is a deficient number, since it is larger than the sum of its proper divisors (73407084583).

540581209817 is a wasteful number, since it uses less digits than its factorization.

540581209817 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17857.

The product of its (nonzero) digits is 806400, while the sum is 50.

The spelling of 540581209817 in words is "five hundred forty billion, five hundred eighty-one million, two hundred nine thousand, eight hundred seventeen".