5540844561 has 32 divisors (see below), whose sum is σ = 9108557568. Its totient is φ = 2923714560.

The previous prime is 5540844541. The next prime is 5540844563. The reversal of 5540844561 is 1654480455.

It is not a de Polignac number, because 5540844561 - 2⁶ = 5540844497 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (5540844563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 127500 + ... + 165341.

It is an arithmetic number, because the mean of its divisors is an integer number (284642424).

Almost surely, 2^5540844561 is an apocalyptic number.

5540844561 is a gapful number since it is divisible by the number (51) formed by its first and last digit.

It is an amenable number.

5540844561 is a deficient number, since it is larger than the sum of its proper divisors (3567713007).

5540844561 is a wasteful number, since it uses less digits than its factorization.

5540844561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 292921.

The product of its (nonzero) digits is 384000, while the sum is 42.

The square root of 5540844561 is about 74436.8494833036. The cubic root of 5540844561 is about 1769.5329569872.

The spelling of 5540844561 in words is "five billion, five hundred forty million, eight hundred forty-four thousand, five hundred sixty-one".