540056561 has 32 divisors (see below), whose sum is σ = 638668800. Its totient is φ = 451226880.

The previous prime is 540056557. The next prime is 540056563. The reversal of 540056561 is 165650045.

It is a cyclic number.

It is not a de Polignac number, because 540056561 - 2² = 540056557 is a prime.

It is a super-2 number, since 2×540056561² = 583322178158293442, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (540056563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2053316 + ... + 2053578.

It is an arithmetic number, because the mean of its divisors is an integer number (19958400).

Almost surely, 2^540056561 is an apocalyptic number.

It is an amenable number.

540056561 is a deficient number, since it is larger than the sum of its proper divisors (98612239).

540056561 is a wasteful number, since it uses less digits than its factorization.

540056561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 509.

The product of its (nonzero) digits is 18000, while the sum is 32.

The square root of 540056561 is about 23239.1170443285. The cubic root of 540056561 is about 814.3537154997.

The spelling of 540056561 in words is "five hundred forty million, fifty-six thousand, five hundred sixty-one".