77663563041161 has 2 divisors, whose sum is σ = 77663563041162. Its totient is φ = 77663563041160.

The previous prime is 77663563041121. The next prime is 77663563041293. The reversal of 77663563041161 is 16114036536677.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 45565956065536 + 32097606975625 = 6750256^2 + 5665475^2 .

It is a cyclic number.

It is not a de Polignac number, because 77663563041161 - 2¹⁸ = 77663562779017 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 77663563041097 and 77663563041106.

It is not a weakly prime, because it can be changed into another prime (77663563041121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38831781520580 + 38831781520581.

It is an arithmetic number, because the mean of its divisors is an integer number (38831781520581).

Almost surely, 2^{77663563041161} is an apocalyptic number.

It is an amenable number.

77663563041161 is a deficient number, since it is larger than the sum of its proper divisors (1).

77663563041161 is an equidigital number, since it uses as much as digits as its factorization.

77663563041161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11430720, while the sum is 56.

The spelling of 77663563041161 in words is "seventy-seven trillion, six hundred sixty-three billion, five hundred sixty-three million, forty-one thousand, one hundred sixty-one".