11924737876781 has 2 divisors, whose sum is σ = 11924737876782. Its totient is φ = 11924737876780.

The previous prime is 11924737876747. The next prime is 11924737876871. The reversal of 11924737876781 is 18767873742911.

Together with next prime (11924737876871) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11845402141225 + 79335735556 = 3441715^2 + 281666^2 .

It is a cyclic number.

It is not a de Polignac number, because 11924737876781 - 2⁶ = 11924737876717 is a prime.

It is a super-2 number, since 2×11924737876781² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11924737873781) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5962368938390 + 5962368938391.

It is an arithmetic number, because the mean of its divisors is an integer number (5962368938391).

Almost surely, 2^{11924737876781} is an apocalyptic number.

It is an amenable number.

11924737876781 is a deficient number, since it is larger than the sum of its proper divisors (1).

11924737876781 is an equidigital number, since it uses as much as digits as its factorization.

11924737876781 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 199148544, while the sum is 71.

The spelling of 11924737876781 in words is "eleven trillion, nine hundred twenty-four billion, seven hundred thirty-seven million, eight hundred seventy-six thousand, seven hundred eighty-one".