16563129277 has 2 divisors, whose sum is σ = 16563129278. Its totient is φ = 16563129276.

The previous prime is 16563129241. The next prime is 16563129301. The reversal of 16563129277 is 77292136561.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16544647876 + 18481401 = 128626^2 + 4299^2 .

It is a cyclic number.

It is not a de Polignac number, because 16563129277 - 2²⁷ = 16428911549 is a prime.

It is a super-2 number, since 2×16563129277² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 16563129277.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16563129377) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8281564638 + 8281564639.

It is an arithmetic number, because the mean of its divisors is an integer number (8281564639).

Almost surely, 2^16563129277 is an apocalyptic number.

It is an amenable number.

16563129277 is a deficient number, since it is larger than the sum of its proper divisors (1).

16563129277 is an equidigital number, since it uses as much as digits as its factorization.

16563129277 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 952560, while the sum is 49.

The spelling of 16563129277 in words is "sixteen billion, five hundred sixty-three million, one hundred twenty-nine thousand, two hundred seventy-seven".