16542788047439 has 2 divisors, whose sum is σ = 16542788047440. Its totient is φ = 16542788047438.

The previous prime is 16542788047417. The next prime is 16542788047523. The reversal of 16542788047439 is 93474088724561.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16542788047439 is a prime.

It is a super-2 number, since 2×16542788047439² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16542788047139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8271394023719 + 8271394023720.

It is an arithmetic number, because the mean of its divisors is an integer number (8271394023720).

It is a 1-persistent number, because it is pandigital, but 2⋅16542788047439 = 33085576094878 is not.

Almost surely, 2^{16542788047439} is an apocalyptic number.

16542788047439 is a deficient number, since it is larger than the sum of its proper divisors (1).

16542788047439 is an equidigital number, since it uses as much as digits as its factorization.

16542788047439 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 325140480, while the sum is 68.

The spelling of 16542788047439 in words is "sixteen trillion, five hundred forty-two billion, seven hundred eighty-eight million, forty-seven thousand, four hundred thirty-nine".