550533005621 has 2 divisors, whose sum is σ = 550533005622. Its totient is φ = 550533005620.

The previous prime is 550533005609. The next prime is 550533005641. The reversal of 550533005621 is 126500335055.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 507585002500 + 42948003121 = 712450^2 + 207239^2 .

It is a cyclic number.

It is not a de Polignac number, because 550533005621 - 2¹⁸ = 550532743477 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (550533005641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 275266502810 + 275266502811.

It is an arithmetic number, because the mean of its divisors is an integer number (275266502811).

Almost surely, 2^550533005621 is an apocalyptic number.

It is an amenable number.

550533005621 is a deficient number, since it is larger than the sum of its proper divisors (1).

550533005621 is an equidigital number, since it uses as much as digits as its factorization.

550533005621 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 67500, while the sum is 35.

The spelling of 550533005621 in words is "five hundred fifty billion, five hundred thirty-three million, five thousand, six hundred twenty-one".