11840781613 has 2 divisors, whose sum is σ = 11840781614. Its totient is φ = 11840781612.

The previous prime is 11840781599. The next prime is 11840781619. The reversal of 11840781613 is 31618704811.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7110368329 + 4730413284 = 84323^2 + 68778^2 .

It is a cyclic number.

It is not a de Polignac number, because 11840781613 - 2¹⁷ = 11840650541 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11840781619) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5920390806 + 5920390807.

It is an arithmetic number, because the mean of its divisors is an integer number (5920390807).

Almost surely, 2^11840781613 is an apocalyptic number.

It is an amenable number.

11840781613 is a deficient number, since it is larger than the sum of its proper divisors (1).

11840781613 is an equidigital number, since it uses as much as digits as its factorization.

11840781613 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32256, while the sum is 40.

The spelling of 11840781613 in words is "eleven billion, eight hundred forty million, seven hundred eighty-one thousand, six hundred thirteen".