16564040451457 has 2 divisors, whose sum is σ = 16564040451458. Its totient is φ = 16564040451456.

The previous prime is 16564040451443. The next prime is 16564040451467. The reversal of 16564040451457 is 75415404046561.

It is a happy number.

16564040451457 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13286054160016 + 3277986291441 = 3645004^2 + 1810521^2 .

It is a cyclic number.

It is not a de Polignac number, because 16564040451457 - 2³⁹ = 16014284637569 is a prime.

It is not a weakly prime, because it can be changed into another prime (16564040451467) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8282020225728 + 8282020225729.

It is an arithmetic number, because the mean of its divisors is an integer number (8282020225729).

Almost surely, 2^{16564040451457} is an apocalyptic number.

It is an amenable number.

16564040451457 is a deficient number, since it is larger than the sum of its proper divisors (1).

16564040451457 is an equidigital number, since it uses as much as digits as its factorization.

16564040451457 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8064000, while the sum is 52.

The spelling of 16564040451457 in words is "sixteen trillion, five hundred sixty-four billion, forty million, four hundred fifty-one thousand, four hundred fifty-seven".