11939180820481 has 2 divisors, whose sum is σ = 11939180820482. Its totient is φ = 11939180820480.

The previous prime is 11939180820467. The next prime is 11939180820491. The reversal of 11939180820481 is 18402808193911.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9658476780481 + 2280704040000 = 3107809^2 + 1510200^2 .

It is a cyclic number.

It is not a de Polignac number, because 11939180820481 - 2⁵ = 11939180820449 is a prime.

It is a super-2 number, since 2×11939180820481² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (11939180820401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5969590410240 + 5969590410241.

It is an arithmetic number, because the mean of its divisors is an integer number (5969590410241).

Almost surely, 2^{11939180820481} is an apocalyptic number.

It is an amenable number.

11939180820481 is a deficient number, since it is larger than the sum of its proper divisors (1).

11939180820481 is an equidigital number, since it uses as much as digits as its factorization.

11939180820481 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 995328, while the sum is 55.

The spelling of 11939180820481 in words is "eleven trillion, nine hundred thirty-nine billion, one hundred eighty million, eight hundred twenty thousand, four hundred eighty-one".