21611716677307 has 2 divisors, whose sum is σ = 21611716677308. Its totient is φ = 21611716677306.

The previous prime is 21611716677283. The next prime is 21611716677359. The reversal of 21611716677307 is 70377661711612.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21611716677307 - 2⁴³ = 12815623655099 is a prime.

It is not a weakly prime, because it can be changed into another prime (21611716677377) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10805858338653 + 10805858338654.

It is an arithmetic number, because the mean of its divisors is an integer number (10805858338654).

Almost surely, 2^{21611716677307} is an apocalyptic number.

21611716677307 is a deficient number, since it is larger than the sum of its proper divisors (1).

21611716677307 is an equidigital number, since it uses as much as digits as its factorization.

21611716677307 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3111696, while the sum is 55.

The spelling of 21611716677307 in words is "twenty-one trillion, six hundred eleven billion, seven hundred sixteen million, six hundred seventy-seven thousand, three hundred seven".