10661561364343 has 2 divisors, whose sum is σ = 10661561364344. Its totient is φ = 10661561364342.

The previous prime is 10661561364283. The next prime is 10661561364359. The reversal of 10661561364343 is 34346316516601.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10661561364343 is a prime.

It is a super-2 number, since 2×10661561364343² (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 (10661561664343) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5330780682171 + 5330780682172.

It is an arithmetic number, because the mean of its divisors is an integer number (5330780682172).

Almost surely, 2^{10661561364343} is an apocalyptic number.

10661561364343 is a deficient number, since it is larger than the sum of its proper divisors (1).

10661561364343 is an equidigital number, since it uses as much as digits as its factorization.

10661561364343 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2799360, while the sum is 49.

The spelling of 10661561364343 in words is "ten trillion, six hundred sixty-one billion, five hundred sixty-one million, three hundred sixty-four thousand, three hundred forty-three".