540594681521 has 8 divisors (see below), whose sum is σ = 569214912000. Its totient is φ = 511991238960.

The previous prime is 540594681509. The next prime is 540594681527. The reversal of 540594681521 is 125186495045.

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 540594681521 - 2³⁰ = 539520939697 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 540594681521.

It is not an unprimeable number, because it can be changed into a prime (540594681527) 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, 4130846 + ... + 4259703.

It is an arithmetic number, because the mean of its divisors is an integer number (71151864000).

Almost surely, 2^540594681521 is an apocalyptic number.

It is an amenable number.

540594681521 is a deficient number, since it is larger than the sum of its proper divisors (28620230479).

540594681521 is a wasteful number, since it uses less digits than its factorization.

540594681521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8393959.

The product of its (nonzero) digits is 1728000, while the sum is 50.

The spelling of 540594681521 in words is "five hundred forty billion, five hundred ninety-four million, six hundred eighty-one thousand, five hundred twenty-one".