550405689 has 16 divisors (see below), whose sum is σ = 765967104. Its totient is φ = 351228800.

The previous prime is 550405657. The next prime is 550405693. The reversal of 550405689 is 986504055.

It is a cyclic number.

It is not a de Polignac number, because 550405689 - 2⁵ = 550405657 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 550405689.

It is not an unprimeable number, because it can be changed into a prime (550405189) 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 15 ways as a sum of consecutive naturals, for example, 35697 + ... + 48734.

It is an arithmetic number, because the mean of its divisors is an integer number (47872944).

Almost surely, 2^550405689 is an apocalyptic number.

It is an amenable number.

550405689 is a deficient number, since it is larger than the sum of its proper divisors (215561415).

550405689 is a wasteful number, since it uses less digits than its factorization.

550405689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84528.

The product of its (nonzero) digits is 216000, while the sum is 42.

The square root of 550405689 is about 23460.7265232772. The cubic root of 550405689 is about 819.5226693492.

The spelling of 550405689 in words is "five hundred fifty million, four hundred five thousand, six hundred eighty-nine".