541612066555621 has 2 divisors, whose sum is σ = 541612066555622. Its totient is φ = 541612066555620.

The previous prime is 541612066555613. The next prime is 541612066555633. The reversal of 541612066555621 is 126555660216145.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 463471575992100 + 78140490563521 = 21528390^2 + 8839711^2 .

It is a cyclic number.

It is not a de Polignac number, because 541612066555621 - 2³ = 541612066555613 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (541612066555691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 270806033277810 + 270806033277811.

It is an arithmetic number, because the mean of its divisors is an integer number (270806033277811).

Almost surely, 2^{541612066555621} is an apocalyptic number.

It is an amenable number.

541612066555621 is a deficient number, since it is larger than the sum of its proper divisors (1).

541612066555621 is an equidigital number, since it uses as much as digits as its factorization.

541612066555621 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12960000, while the sum is 55.

The spelling of 541612066555621 in words is "five hundred forty-one trillion, six hundred twelve billion, sixty-six million, five hundred fifty-five thousand, six hundred twenty-one".