11864334661 has 2 divisors, whose sum is σ = 11864334662. Its totient is φ = 11864334660.

The previous prime is 11864334649. The next prime is 11864334689. The reversal of 11864334661 is 16643346811.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10752445636 + 1111889025 = 103694^2 + 33345^2 .

It is a cyclic number.

It is not a de Polignac number, because 11864334661 - 2⁹ = 11864334149 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11864334611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5932167330 + 5932167331.

It is an arithmetic number, because the mean of its divisors is an integer number (5932167331).

Almost surely, 2^11864334661 is an apocalyptic number.

It is an amenable number.

11864334661 is a deficient number, since it is larger than the sum of its proper divisors (1).

11864334661 is an equidigital number, since it uses as much as digits as its factorization.

11864334661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 248832, while the sum is 43.

The spelling of 11864334661 in words is "eleven billion, eight hundred sixty-four million, three hundred thirty-four thousand, six hundred sixty-one".