550611641 has 2 divisors, whose sum is σ = 550611642. Its totient is φ = 550611640.

The previous prime is 550611613. The next prime is 550611643. The reversal of 550611641 is 146116055.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 377136400 + 173475241 = 19420^2 + 13171^2 .

It is a cyclic number.

It is not a de Polignac number, because 550611641 - 2²⁶ = 483502777 is a prime.

Together with 550611643, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (550611643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 275305820 + 275305821.

It is an arithmetic number, because the mean of its divisors is an integer number (275305821).

Almost surely, 2^550611641 is an apocalyptic number.

It is an amenable number.

550611641 is a deficient number, since it is larger than the sum of its proper divisors (1).

550611641 is an equidigital number, since it uses as much as digits as its factorization.

550611641 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3600, while the sum is 29.

The square root of 550611641 is about 23465.1154056399. The cubic root of 550611641 is about 819.6248735286.

Adding to 550611641 its reverse (146116055), we get a palindrome (696727696).

The spelling of 550611641 in words is "five hundred fifty million, six hundred eleven thousand, six hundred forty-one".