550340643661 has 8 divisors (see below), whose sum is σ = 550855748664. Its totient is φ = 549825642240.

The previous prime is 550340643599. The next prime is 550340643673. The reversal of 550340643661 is 166346043055.

It can be written as a sum of positive squares in 4 ways, for example, as 15145978761 + 535194664900 = 123069^2 + 731570^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 550340643661 - 2⁷ = 550340643533 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (550340613661) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14120481 + ... + 14159401.

It is an arithmetic number, because the mean of its divisors is an integer number (68856968583).

Almost surely, 2^550340643661 is an apocalyptic number.

It is an amenable number.

550340643661 is a deficient number, since it is larger than the sum of its proper divisors (515105003).

550340643661 is a wasteful number, since it uses less digits than its factorization.

550340643661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51791.

The product of its (nonzero) digits is 777600, while the sum is 43.

The spelling of 550340643661 in words is "five hundred fifty billion, three hundred forty million, six hundred forty-three thousand, six hundred sixty-one".