182138184881 has 2 divisors, whose sum is σ = 182138184882. Its totient is φ = 182138184880.

The previous prime is 182138184859. The next prime is 182138184887. The reversal of 182138184881 is 188481831281.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 174072528400 + 8065656481 = 417220^2 + 89809^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-182138184881 is a prime.

It is a super-2 number, since 2×182138184881² (a number of 23 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (182138184887) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 91069092440 + 91069092441.

It is an arithmetic number, because the mean of its divisors is an integer number (91069092441).

Almost surely, 2^182138184881 is an apocalyptic number.

It is an amenable number.

182138184881 is a deficient number, since it is larger than the sum of its proper divisors (1).

182138184881 is an equidigital number, since it uses as much as digits as its factorization.

182138184881 is an evil number, because the sum of its binary digits is even.

The product of its digits is 786432, while the sum is 53.

The spelling of 182138184881 in words is "one hundred eighty-two billion, one hundred thirty-eight million, one hundred eighty-four thousand, eight hundred eighty-one".