16021451731717 has 2 divisors, whose sum is σ = 16021451731718. Its totient is φ = 16021451731716.

The previous prime is 16021451731679. The next prime is 16021451731721. The reversal of 16021451731717 is 71713715412061.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15551775893476 + 469675838241 = 3943574^2 + 685329^2 .

It is a cyclic number.

It is not a de Polignac number, because 16021451731717 - 2²³ = 16021443343109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16021451761717) 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, 8010725865858 + 8010725865859.

It is an arithmetic number, because the mean of its divisors is an integer number (8010725865859).

Almost surely, 2^{16021451731717} is an apocalyptic number.

It is an amenable number.

16021451731717 is a deficient number, since it is larger than the sum of its proper divisors (1).

16021451731717 is an equidigital number, since it uses as much as digits as its factorization.

16021451731717 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 246960, while the sum is 46.

The spelling of 16021451731717 in words is "sixteen trillion, twenty-one billion, four hundred fifty-one million, seven hundred thirty-one thousand, seven hundred seventeen".