11746039681 has 2 divisors, whose sum is σ = 11746039682. Its totient is φ = 11746039680.

The previous prime is 11746039663. The next prime is 11746039727. The reversal of 11746039681 is 18693064711.

11746039681 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an a-pointer prime, because the next prime (11746039727) can be obtained adding 11746039681 to its sum of digits (46).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10695696400 + 1050343281 = 103420^2 + 32409^2 .

It is an emirp because it is prime and its reverse (18693064711) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11746039681 - 2⁷ = 11746039553 is a prime.

It is a super-4 number, since 4×11746039681⁴ (a number of 41 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is not a weakly prime, because it can be changed into another prime (11746039651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5873019840 + 5873019841.

It is an arithmetic number, because the mean of its divisors is an integer number (5873019841).

Almost surely, 2^11746039681 is an apocalyptic number.

It is an amenable number.

11746039681 is a deficient number, since it is larger than the sum of its proper divisors (1).

11746039681 is an equidigital number, since it uses as much as digits as its factorization.

11746039681 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 217728, while the sum is 46.

The spelling of 11746039681 in words is "eleven billion, seven hundred forty-six million, thirty-nine thousand, six hundred eighty-one".