550991636 has 12 divisors (see below), whose sum is σ = 1038407412. Its totient is φ = 254303808.

The previous prime is 550991603. The next prime is 550991681. The reversal of 550991636 is 636199055.

550991636 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 172922500 + 378069136 = 13150^2 + 19444^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5297945 + ... + 5298048.

It is an arithmetic number, because the mean of its divisors is an integer number (86533951).

Almost surely, 2^550991636 is an apocalyptic number.

It is an amenable number.

550991636 is a deficient number, since it is larger than the sum of its proper divisors (487415776).

550991636 is a wasteful number, since it uses less digits than its factorization.

550991636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10596010 (or 10596008 counting only the distinct ones).

The product of its (nonzero) digits is 218700, while the sum is 44.

The square root of 550991636 is about 23473.2110287451. The cubic root of 550991636 is about 819.8133800972.

The spelling of 550991636 in words is "five hundred fifty million, nine hundred ninety-one thousand, six hundred thirty-six".