16651050111517 has 2 divisors, whose sum is σ = 16651050111518. Its totient is φ = 16651050111516.

The previous prime is 16651050111497. The next prime is 16651050111539. The reversal of 16651050111517 is 71511105015661.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10293965313241 + 6357084798276 = 3208421^2 + 2521326^2 .

It is a cyclic number.

It is not a de Polignac number, because 16651050111517 - 2²⁷ = 16650915893789 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 16651050111517.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16651050112517) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8325525055758 + 8325525055759.

It is an arithmetic number, because the mean of its divisors is an integer number (8325525055759).

Almost surely, 2^{16651050111517} is an apocalyptic number.

It is an amenable number.

16651050111517 is a deficient number, since it is larger than the sum of its proper divisors (1).

16651050111517 is an equidigital number, since it uses as much as digits as its factorization.

16651050111517 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 31500, while the sum is 40.

The spelling of 16651050111517 in words is "sixteen trillion, six hundred fifty-one billion, fifty million, one hundred eleven thousand, five hundred seventeen".