77366401463161 has 2 divisors, whose sum is σ = 77366401463162. Its totient is φ = 77366401463160.

The previous prime is 77366401463093. The next prime is 77366401463249. The reversal of 77366401463161 is 16136410466377.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 63488131587136 + 13878269876025 = 7967944^2 + 3725355^2 .

It is an emirp because it is prime and its reverse (16136410466377) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 77366401463161 - 2²⁷ = 77366267245433 is a prime.

It is a super-2 number, since 2×77366401463161² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (77366407463161) 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, 38683200731580 + 38683200731581.

It is an arithmetic number, because the mean of its divisors is an integer number (38683200731581).

Almost surely, 2^{77366401463161} is an apocalyptic number.

It is an amenable number.

77366401463161 is a deficient number, since it is larger than the sum of its proper divisors (1).

77366401463161 is an equidigital number, since it uses as much as digits as its factorization.

77366401463161 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9144576, while the sum is 55.

The spelling of 77366401463161 in words is "seventy-seven trillion, three hundred sixty-six billion, four hundred one million, four hundred sixty-three thousand, one hundred sixty-one".