8663250984961 has 2 divisors, whose sum is σ = 8663250984962. Its totient is φ = 8663250984960.

The previous prime is 8663250984931. The next prime is 8663250984991. The reversal of 8663250984961 is 1694890523668.

It is a balanced prime because it is at equal distance from previous prime (8663250984931) and next prime (8663250984991).

It can be written as a sum of positive squares in only one way, i.e., 6772777231936 + 1890473753025 = 2602456^2 + 1374945^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8663250984961 is a prime.

It is not a weakly prime, because it can be changed into another prime (8663250984931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4331625492480 + 4331625492481.

It is an arithmetic number, because the mean of its divisors is an integer number (4331625492481).

Almost surely, 2^{8663250984961} is an apocalyptic number.

It is an amenable number.

8663250984961 is a deficient number, since it is larger than the sum of its proper divisors (1).

8663250984961 is an equidigital number, since it uses as much as digits as its factorization.

8663250984961 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 134369280, while the sum is 67.

The spelling of 8663250984961 in words is "eight trillion, six hundred sixty-three billion, two hundred fifty million, nine hundred eighty-four thousand, nine hundred sixty-one".