16720142140061 has 2 divisors, whose sum is σ = 16720142140062. Its totient is φ = 16720142140060.

The previous prime is 16720142139991. The next prime is 16720142140069. The reversal of 16720142140061 is 16004124102761.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9071631967225 + 7648510172836 = 3011915^2 + 2765594^2 .

It is a cyclic number.

It is not a de Polignac number, because 16720142140061 - 2²⁶ = 16720075031197 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16720142140069) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8360071070030 + 8360071070031.

It is an arithmetic number, because the mean of its divisors is an integer number (8360071070031).

Almost surely, 2^{16720142140061} is an apocalyptic number.

It is an amenable number.

16720142140061 is a deficient number, since it is larger than the sum of its proper divisors (1).

16720142140061 is an equidigital number, since it uses as much as digits as its factorization.

16720142140061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16128, while the sum is 35.

The spelling of 16720142140061 in words is "sixteen trillion, seven hundred twenty billion, one hundred forty-two million, one hundred forty thousand, sixty-one".