550549971664 has 80 divisors (see below), whose sum is σ = 1331322039936. Its totient is φ = 214270617600.

The previous prime is 550549971661. The next prime is 550549971677. The reversal of 550549971664 is 466179945055.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (550549971661) 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 15 ways as a sum of consecutive naturals, for example, 915924 + ... + 1392844.

Almost surely, 2^550549971664 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 550549971664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (665661019968).

550549971664 is an abundant number, since it is smaller than the sum of its proper divisors (780772068272).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

550549971664 is a wasteful number, since it uses less digits than its factorization.

550549971664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 477884 (or 477878 counting only the distinct ones).

The product of its (nonzero) digits is 40824000, while the sum is 61.

The spelling of 550549971664 in words is "five hundred fifty billion, five hundred forty-nine million, nine hundred seventy-one thousand, six hundred sixty-four".