8646661028231 has 2 divisors, whose sum is σ = 8646661028232. Its totient is φ = 8646661028230.

The previous prime is 8646661028197. The next prime is 8646661028263. The reversal of 8646661028231 is 1328201666468.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 8646661028231 - 2⁶ = 8646661028167 is a prime.

It is a super-2 number, since 2×8646661028231² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8646661028531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4323330514115 + 4323330514116.

It is an arithmetic number, because the mean of its divisors is an integer number (4323330514116).

Almost surely, 2^{8646661028231} is an apocalyptic number.

8646661028231 is a deficient number, since it is larger than the sum of its proper divisors (1).

8646661028231 is an equidigital number, since it uses as much as digits as its factorization.

8646661028231 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3981312, while the sum is 53.

The spelling of 8646661028231 in words is "eight trillion, six hundred forty-six billion, six hundred sixty-one million, twenty-eight thousand, two hundred thirty-one".