17765364961 has 2 divisors, whose sum is σ = 17765364962. Its totient is φ = 17765364960.

The previous prime is 17765364937. The next prime is 17765365031. The reversal of 17765364961 is 16946356771.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17514934336 + 250430625 = 132344^2 + 15825^2 .

It is a cyclic number.

It is not a de Polignac number, because 17765364961 - 2²⁵ = 17731810529 is a prime.

It is not a weakly prime, because it can be changed into another prime (17765364931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8882682480 + 8882682481.

It is an arithmetic number, because the mean of its divisors is an integer number (8882682481).

Almost surely, 2^17765364961 is an apocalyptic number.

It is an amenable number.

17765364961 is a deficient number, since it is larger than the sum of its proper divisors (1).

17765364961 is an equidigital number, since it uses as much as digits as its factorization.

17765364961 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5715360, while the sum is 55.

The spelling of 17765364961 in words is "seventeen billion, seven hundred sixty-five million, three hundred sixty-four thousand, nine hundred sixty-one".