11680538861 has 2 divisors, whose sum is σ = 11680538862. Its totient is φ = 11680538860.

The previous prime is 11680538833. The next prime is 11680538873. The reversal of 11680538861 is 16883508611.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7262277961 + 4418260900 = 85219^2 + 66470^2 .

It is a cyclic number.

It is not a de Polignac number, because 11680538861 - 2²² = 11676344557 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11680532861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5840269430 + 5840269431.

It is an arithmetic number, because the mean of its divisors is an integer number (5840269431).

Almost surely, 2^11680538861 is an apocalyptic number.

It is an amenable number.

11680538861 is a deficient number, since it is larger than the sum of its proper divisors (1).

11680538861 is an equidigital number, since it uses as much as digits as its factorization.

11680538861 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 276480, while the sum is 47.

The spelling of 11680538861 in words is "eleven billion, six hundred eighty million, five hundred thirty-eight thousand, eight hundred sixty-one".