11789078681 has 2 divisors, whose sum is σ = 11789078682. Its totient is φ = 11789078680.

The previous prime is 11789078627. The next prime is 11789078711. The reversal of 11789078681 is 18687098711.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9561710656 + 2227368025 = 97784^2 + 47195^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11789078681 is a prime.

It is a super-2 number, since 2×11789078681² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (11789078981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5894539340 + 5894539341.

It is an arithmetic number, because the mean of its divisors is an integer number (5894539341).

Almost surely, 2^11789078681 is an apocalyptic number.

It is an amenable number.

11789078681 is a deficient number, since it is larger than the sum of its proper divisors (1).

11789078681 is an equidigital number, since it uses as much as digits as its factorization.

11789078681 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1354752, while the sum is 56.

The spelling of 11789078681 in words is "eleven billion, seven hundred eighty-nine million, seventy-eight thousand, six hundred eighty-one".