1566343162541 has 2 divisors, whose sum is σ = 1566343162542. Its totient is φ = 1566343162540.

The previous prime is 1566343162499. The next prime is 1566343162661. The reversal of 1566343162541 is 1452613436651.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1352520154441 + 213823008100 = 1162979^2 + 462410^2 .

It is a cyclic number.

It is not a de Polignac number, because 1566343162541 - 2¹⁰ = 1566343161517 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1566343161541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 783171581270 + 783171581271.

It is an arithmetic number, because the mean of its divisors is an integer number (783171581271).

Almost surely, 2^{1566343162541} is an apocalyptic number.

It is an amenable number.

1566343162541 is a deficient number, since it is larger than the sum of its proper divisors (1).

1566343162541 is an equidigital number, since it uses as much as digits as its factorization.

1566343162541 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1555200, while the sum is 47.

The spelling of 1566343162541 in words is "one trillion, five hundred sixty-six billion, three hundred forty-three million, one hundred sixty-two thousand, five hundred forty-one".