550643611340531 has 16 divisors (see below), whose sum is σ = 553482585658368. Its totient is φ = 547812056832000.

The previous prime is 550643611340521. The next prime is 550643611340561. The reversal of 550643611340531 is 135043116346055.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-550643611340531 is a prime.

It is a super-2 number, since 2×550643611340531² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (550643611340521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4189217771 + ... + 4189349211.

It is an arithmetic number, because the mean of its divisors is an integer number (34592661603648).

Almost surely, 2^{550643611340531} is an apocalyptic number.

550643611340531 is a deficient number, since it is larger than the sum of its proper divisors (2838974317837).

550643611340531 is a wasteful number, since it uses less digits than its factorization.

550643611340531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159502.

The product of its (nonzero) digits is 1944000, while the sum is 47.

Adding to 550643611340531 its reverse (135043116346055), we get a palindrome (685686727686586).

The spelling of 550643611340531 in words is "five hundred fifty trillion, six hundred forty-three billion, six hundred eleven million, three hundred forty thousand, five hundred thirty-one".