5540881685 has 4 divisors (see below), whose sum is σ = 6649058028. Its totient is φ = 4432705344.

The previous prime is 5540881679. The next prime is 5540881699. The reversal of 5540881685 is 5861880455.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3416870116 + 2124011569 = 58454^2 + 46087^2 .

It is a cyclic number.

It is not a de Polignac number, because 5540881685 - 2¹⁰ = 5540880661 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 554088164 + ... + 554088173.

It is an arithmetic number, because the mean of its divisors is an integer number (1662264507).

Almost surely, 2^5540881685 is an apocalyptic number.

It is an amenable number.

5540881685 is a deficient number, since it is larger than the sum of its proper divisors (1108176343).

5540881685 is a wasteful number, since it uses less digits than its factorization.

5540881685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1108176342.

The product of its (nonzero) digits is 1536000, while the sum is 50.

The square root of 5540881685 is about 74437.0988486252. The cubic root of 5540881685 is about 1769.5369089717.

The spelling of 5540881685 in words is "five billion, five hundred forty million, eight hundred eighty-one thousand, six hundred eighty-five".