8313694639661 has 2 divisors, whose sum is σ = 8313694639662. Its totient is φ = 8313694639660.

The previous prime is 8313694639639. The next prime is 8313694639681. The reversal of 8313694639661 is 1669364963138.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8066770122436 + 246924517225 = 2840206^2 + 496915^2 .

It is a cyclic number.

It is not a de Polignac number, because 8313694639661 - 2³⁰ = 8312620897837 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8313694639681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4156847319830 + 4156847319831.

It is an arithmetic number, because the mean of its divisors is an integer number (4156847319831).

Almost surely, 2^{8313694639661} is an apocalyptic number.

It is an amenable number.

8313694639661 is a deficient number, since it is larger than the sum of its proper divisors (1).

8313694639661 is an equidigital number, since it uses as much as digits as its factorization.

8313694639661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 90699264, while the sum is 65.

The spelling of 8313694639661 in words is "eight trillion, three hundred thirteen billion, six hundred ninety-four million, six hundred thirty-nine thousand, six hundred sixty-one".