91667157842977 has 2 divisors, whose sum is σ = 91667157842978. Its totient is φ = 91667157842976.

The previous prime is 91667157842971. The next prime is 91667157842999. The reversal of 91667157842977 is 77924875176619.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 64704021542161 + 26963136300816 = 8043881^2 + 5192604^2 .

It is a cyclic number.

It is not a de Polignac number, because 91667157842977 - 2²⁷ = 91667023625249 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 91667157842897 and 91667157842906.

It is not a weakly prime, because it can be changed into another prime (91667157842971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45833578921488 + 45833578921489.

It is an arithmetic number, because the mean of its divisors is an integer number (45833578921489).

Almost surely, 2^{91667157842977} is an apocalyptic number.

It is an amenable number.

91667157842977 is a deficient number, since it is larger than the sum of its proper divisors (1).

91667157842977 is an equidigital number, since it uses as much as digits as its factorization.

91667157842977 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2240421120, while the sum is 79.

The spelling of 91667157842977 in words is "ninety-one trillion, six hundred sixty-seven billion, one hundred fifty-seven million, eight hundred forty-two thousand, nine hundred seventy-seven".