8646541213 has 2 divisors, whose sum is σ = 8646541214. Its totient is φ = 8646541212.

The previous prime is 8646541187. The next prime is 8646541217. The reversal of 8646541213 is 3121456468.

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., 8164387449 + 482153764 = 90357^2 + 21958^2 .

It is a cyclic number.

It is not a de Polignac number, because 8646541213 - 2³³ = 56606621 is a prime.

It is a super-2 number, since 2×8646541213² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8646541217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4323270606 + 4323270607.

It is an arithmetic number, because the mean of its divisors is an integer number (4323270607).

Almost surely, 2^8646541213 is an apocalyptic number.

It is an amenable number.

8646541213 is a deficient number, since it is larger than the sum of its proper divisors (1).

8646541213 is an equidigital number, since it uses as much as digits as its factorization.

8646541213 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 138240, while the sum is 40.

The square root of 8646541213 is about 92986.7797754068. The cubic root of 8646541213 is about 2052.4888441294.

The spelling of 8646541213 in words is "eight billion, six hundred forty-six million, five hundred forty-one thousand, two hundred thirteen".