5540450161 has 16 divisors (see below), whose sum is σ = 5954763600. Its totient is φ = 5136406528.

The previous prime is 5540450159. The next prime is 5540450191. The reversal of 5540450161 is 1610540455.

It can be written as a sum of positive squares in 8 ways, for example, as 2124749025 + 3415701136 = 46095^2 + 58444^2 .

It is a cyclic number.

It is not a de Polignac number, because 5540450161 - 2¹ = 5540450159 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5540450191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 400191 + ... + 413803.

It is an arithmetic number, because the mean of its divisors is an integer number (372172725).

Almost surely, 2^5540450161 is an apocalyptic number.

It is an amenable number.

5540450161 is a deficient number, since it is larger than the sum of its proper divisors (414313439).

5540450161 is a wasteful number, since it uses less digits than its factorization.

5540450161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13988.

The product of its (nonzero) digits is 12000, while the sum is 31.

The square root of 5540450161 is about 74434.2002106559. The cubic root of 5540450161 is about 1769.4909705867.

The spelling of 5540450161 in words is "five billion, five hundred forty million, four hundred fifty thousand, one hundred sixty-one".