550605758261 has 16 divisors (see below), whose sum is σ = 598959377520. Its totient is φ = 503111347200.

The previous prime is 550605758203. The next prime is 550605758273. The reversal of 550605758261 is 162857506055.

It can be written as a sum of positive squares in 8 ways, for example, as 360772036 + 550244986225 = 18994^2 + 741785^2 .

It is a cyclic number.

It is not a de Polignac number, because 550605758261 - 2²² = 550601563957 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 (550605758281) 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, 6434525 + ... + 6519533.

It is an arithmetic number, because the mean of its divisors is an integer number (37434961095).

Almost surely, 2^550605758261 is an apocalyptic number.

It is an amenable number.

550605758261 is a deficient number, since it is larger than the sum of its proper divisors (48353619259).

550605758261 is a wasteful number, since it uses less digits than its factorization.

550605758261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90056.

The product of its (nonzero) digits is 2520000, while the sum is 50.

The spelling of 550605758261 in words is "five hundred fifty billion, six hundred five million, seven hundred fifty-eight thousand, two hundred sixty-one".