16447739557679 has 2 divisors, whose sum is σ = 16447739557680. Its totient is φ = 16447739557678.

The previous prime is 16447739557661. The next prime is 16447739557721. The reversal of 16447739557679 is 97675593774461.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 16447739557679 - 2⁸ = 16447739557423 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16447739557649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8223869778839 + 8223869778840.

It is an arithmetic number, because the mean of its divisors is an integer number (8223869778840).

Almost surely, 2^{16447739557679} is an apocalyptic number.

16447739557679 is a deficient number, since it is larger than the sum of its proper divisors (1).

16447739557679 is an equidigital number, since it uses as much as digits as its factorization.

16447739557679 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8401579200, while the sum is 80.

The spelling of 16447739557679 in words is "sixteen trillion, four hundred forty-seven billion, seven hundred thirty-nine million, five hundred fifty-seven thousand, six hundred seventy-nine".