9781127144161 has 2 divisors, whose sum is σ = 9781127144162. Its totient is φ = 9781127144160.

The previous prime is 9781127144143. The next prime is 9781127144221. The reversal of 9781127144161 is 1614417211879.

It is a happy number.

9781127144161 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8342161358400 + 1438965785761 = 2888280^2 + 1199569^2 .

It is a cyclic number.

It is not a de Polignac number, because 9781127144161 - 2¹¹ = 9781127142113 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 9781127144099 and 9781127144108.

It is not a weakly prime, because it can be changed into another prime (9781127144141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4890563572080 + 4890563572081.

It is an arithmetic number, because the mean of its divisors is an integer number (4890563572081).

Almost surely, 2^{9781127144161} is an apocalyptic number.

It is an amenable number.

9781127144161 is a deficient number, since it is larger than the sum of its proper divisors (1).

9781127144161 is an equidigital number, since it uses as much as digits as its factorization.

9781127144161 is an evil number, because the sum of its binary digits is even.

The product of its digits is 677376, while the sum is 52.

The spelling of 9781127144161 in words is "nine trillion, seven hundred eighty-one billion, one hundred twenty-seven million, one hundred forty-four thousand, one hundred sixty-one".