16504542136361 has 2 divisors, whose sum is σ = 16504542136362. Its totient is φ = 16504542136360.

The previous prime is 16504542136267. The next prime is 16504542136463. The reversal of 16504542136361 is 16363124540561.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16063911696361 + 440630440000 = 4007981^2 + 663800^2 .

It is a cyclic number.

It is not a de Polignac number, because 16504542136361 - 2¹⁴ = 16504542119977 is a prime.

It is a super-2 number, since 2×16504542136361² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (16504542136861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8252271068180 + 8252271068181.

It is an arithmetic number, because the mean of its divisors is an integer number (8252271068181).

Almost surely, 2^{16504542136361} is an apocalyptic number.

It is an amenable number.

16504542136361 is a deficient number, since it is larger than the sum of its proper divisors (1).

16504542136361 is an equidigital number, since it uses as much as digits as its factorization.

16504542136361 is an odious number, because the sum of its binary digits is odd.

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

The spelling of 16504542136361 in words is "sixteen trillion, five hundred four billion, five hundred forty-two million, one hundred thirty-six thousand, three hundred sixty-one".