541563366405961 has 2 divisors, whose sum is σ = 541563366405962. Its totient is φ = 541563366405960.

The previous prime is 541563366405881. The next prime is 541563366405967. The reversal of 541563366405961 is 169504663365145.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 331178668839225 + 210384697566736 = 18198315^2 + 14504644^2 .

It is a cyclic number.

It is not a de Polignac number, because 541563366405961 - 2¹³ = 541563366397769 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 541563366405893 and 541563366405902.

It is not a weakly prime, because it can be changed into another prime (541563366405967) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 270781683202980 + 270781683202981.

It is an arithmetic number, because the mean of its divisors is an integer number (270781683202981).

Almost surely, 2^{541563366405961} is an apocalyptic number.

It is an amenable number.

541563366405961 is a deficient number, since it is larger than the sum of its proper divisors (1).

541563366405961 is an equidigital number, since it uses as much as digits as its factorization.

541563366405961 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 209952000, while the sum is 64.

The spelling of 541563366405961 in words is "five hundred forty-one trillion, five hundred sixty-three billion, three hundred sixty-six million, four hundred five thousand, nine hundred sixty-one".