181127004278449 has 2 divisors, whose sum is σ = 181127004278450. Its totient is φ = 181127004278448.

The previous prime is 181127004278417. The next prime is 181127004278491. The reversal of 181127004278449 is 944872400721181.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 181047385498225 + 79618780224 = 13455385^2 + 282168^2 .

It is a cyclic number.

It is not a de Polignac number, because 181127004278449 - 2⁵ = 181127004278417 is a prime.

It is a super-2 number, since 2×181127004278449² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 181127004278393 and 181127004278402.

It is not a weakly prime, because it can be changed into another prime (181127004278149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 90563502139224 + 90563502139225.

It is an arithmetic number, because the mean of its divisors is an integer number (90563502139225).

Almost surely, 2^{181127004278449} is an apocalyptic number.

It is an amenable number.

181127004278449 is a deficient number, since it is larger than the sum of its proper divisors (1).

181127004278449 is an equidigital number, since it uses as much as digits as its factorization.

181127004278449 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7225344, while the sum is 58.

The spelling of 181127004278449 in words is "one hundred eighty-one trillion, one hundred twenty-seven billion, four million, two hundred seventy-eight thousand, four hundred forty-nine".