16564105734541 has 2 divisors, whose sum is σ = 16564105734542. Its totient is φ = 16564105734540.

The previous prime is 16564105734503. The next prime is 16564105734599. The reversal of 16564105734541 is 14543750146561.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9017684678916 + 7546421055625 = 3002946^2 + 2747075^2 .

It is a cyclic number.

It is not a de Polignac number, because 16564105734541 - 2⁷ = 16564105734413 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16564105734041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8282052867270 + 8282052867271.

It is an arithmetic number, because the mean of its divisors is an integer number (8282052867271).

Almost surely, 2^{16564105734541} is an apocalyptic number.

It is an amenable number.

16564105734541 is a deficient number, since it is larger than the sum of its proper divisors (1).

16564105734541 is an equidigital number, since it uses as much as digits as its factorization.

16564105734541 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6048000, while the sum is 52.

The spelling of 16564105734541 in words is "sixteen trillion, five hundred sixty-four billion, one hundred five million, seven hundred thirty-four thousand, five hundred forty-one".