5515540809 has 8 divisors (see below), whose sum is σ = 7786645920. Its totient is φ = 3460731456.

The previous prime is 5515540763. The next prime is 5515540819. The reversal of 5515540809 is 9080455155.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 5515540809 - 2¹² = 5515536713 is a prime.

It is not an unprimeable number, because it can be changed into a prime (5515540819) 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 7 ways as a sum of consecutive naturals, for example, 54073879 + ... + 54073980.

It is an arithmetic number, because the mean of its divisors is an integer number (973330740).

Almost surely, 2^5515540809 is an apocalyptic number.

It is an amenable number.

5515540809 is a deficient number, since it is larger than the sum of its proper divisors (2271105111).

5515540809 is a wasteful number, since it uses less digits than its factorization.

5515540809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108147879.

The product of its (nonzero) digits is 180000, while the sum is 42.

The square root of 5515540809 is about 74266.6870743539. The cubic root of 5515540809 is about 1766.8351638783.

The spelling of 5515540809 in words is "five billion, five hundred fifteen million, five hundred forty thousand, eight hundred nine".