28341475181 has 2 divisors, whose sum is σ = 28341475182. Its totient is φ = 28341475180.

The previous prime is 28341475171. The next prime is 28341475189. The reversal of 28341475181 is 18157414382.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26776085956 + 1565389225 = 163634^2 + 39565^2 .

It is a cyclic number.

It is not a de Polignac number, because 28341475181 - 2⁶ = 28341475117 is a prime.

It is a super-2 number, since 2×28341475181² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28341475189) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14170737590 + 14170737591.

It is an arithmetic number, because the mean of its divisors is an integer number (14170737591).

Almost surely, 2^28341475181 is an apocalyptic number.

It is an amenable number.

28341475181 is a deficient number, since it is larger than the sum of its proper divisors (1).

28341475181 is an equidigital number, since it uses as much as digits as its factorization.

28341475181 is an evil number, because the sum of its binary digits is even.

The product of its digits is 215040, while the sum is 44.

The spelling of 28341475181 in words is "twenty-eight billion, three hundred forty-one million, four hundred seventy-five thousand, one hundred eighty-one".