550000499991 has 32 divisors (see below), whose sum is σ = 768689264640. Its totient is φ = 349135142400.

The previous prime is 550000499989. The next prime is 550000500017. The reversal of 550000499991 is 199994000055.

It is a happy number.

It is not a de Polignac number, because 550000499991 - 2¹ = 550000499989 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (550000499921) 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 31 ways as a sum of consecutive naturals, for example, 60375345 + ... + 60384453.

It is an arithmetic number, because the mean of its divisors is an integer number (24021539520).

Almost surely, 2^550000499991 is an apocalyptic number.

550000499991 is a deficient number, since it is larger than the sum of its proper divisors (218688764649).

550000499991 is a wasteful number, since it uses less digits than its factorization.

550000499991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13007.

The product of its (nonzero) digits is 656100, while the sum is 51.

The spelling of 550000499991 in words is "five hundred fifty billion, four hundred ninety-nine thousand, nine hundred ninety-one".