11905794181 has 2 divisors, whose sum is σ = 11905794182. Its totient is φ = 11905794180.

The previous prime is 11905794167. The next prime is 11905794211. The reversal of 11905794181 is 18149750911.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11023110081 + 882684100 = 104991^2 + 29710^2 .

It is a cyclic number.

It is not a de Polignac number, because 11905794181 - 2¹³ = 11905785989 is a prime.

It is a super-2 number, since 2×11905794181² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11905794581) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5952897090 + 5952897091.

It is an arithmetic number, because the mean of its divisors is an integer number (5952897091).

Almost surely, 2^11905794181 is an apocalyptic number.

It is an amenable number.

11905794181 is a deficient number, since it is larger than the sum of its proper divisors (1).

11905794181 is an equidigital number, since it uses as much as digits as its factorization.

11905794181 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 90720, while the sum is 46.

The spelling of 11905794181 in words is "eleven billion, nine hundred five million, seven hundred ninety-four thousand, one hundred eighty-one".