11864334649 has 2 divisors, whose sum is σ = 11864334650. Its totient is φ = 11864334648.

The previous prime is 11864334617. The next prime is 11864334661. The reversal of 11864334649 is 94643346811.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11262515625 + 601819024 = 106125^2 + 24532^2 .

It is a cyclic number.

It is not a de Polignac number, because 11864334649 - 2⁵ = 11864334617 is a prime.

It is not a weakly prime, because it can be changed into another prime (11864334689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5932167324 + 5932167325.

It is an arithmetic number, because the mean of its divisors is an integer number (5932167325).

Almost surely, 2^11864334649 is an apocalyptic number.

It is an amenable number.

11864334649 is a deficient number, since it is larger than the sum of its proper divisors (1).

11864334649 is an equidigital number, since it uses as much as digits as its factorization.

11864334649 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1492992, while the sum is 49.

The spelling of 11864334649 in words is "eleven billion, eight hundred sixty-four million, three hundred thirty-four thousand, six hundred forty-nine".