181748241121 has 2 divisors, whose sum is σ = 181748241122. Its totient is φ = 181748241120.

The previous prime is 181748241071. The next prime is 181748241127. The reversal of 181748241121 is 121142847181.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 181509229521 + 239011600 = 426039^2 + 15460^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-181748241121 is a prime.

It is not a weakly prime, because it can be changed into another prime (181748241127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 90874120560 + 90874120561.

It is an arithmetic number, because the mean of its divisors is an integer number (90874120561).

Almost surely, 2^181748241121 is an apocalyptic number.

It is an amenable number.

181748241121 is a deficient number, since it is larger than the sum of its proper divisors (1).

181748241121 is an equidigital number, since it uses as much as digits as its factorization.

181748241121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 28672, while the sum is 40.

The spelling of 181748241121 in words is "one hundred eighty-one billion, seven hundred forty-eight million, two hundred forty-one thousand, one hundred twenty-one".