12830859661 has 4 divisors (see below), whose sum is σ = 12877180732. Its totient is φ = 12784538592.

The previous prime is 12830859641. The next prime is 12830859689. The reversal of 12830859661 is 16695803821.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 16695803821 = 401 ⋅41635421.

It can be written as a sum of positive squares in 2 ways, for example, as 596287561 + 12234572100 = 24419^2 + 110610^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12830859661 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12830859631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23160120 + ... + 23160673.

It is an arithmetic number, because the mean of its divisors is an integer number (3219295183).

Almost surely, 2^12830859661 is an apocalyptic number.

It is an amenable number.

12830859661 is a deficient number, since it is larger than the sum of its proper divisors (46321071).

12830859661 is an equidigital number, since it uses as much as digits as its factorization.

12830859661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46321070.

The product of its (nonzero) digits is 622080, while the sum is 49.

The spelling of 12830859661 in words is "twelve billion, eight hundred thirty million, eight hundred fifty-nine thousand, six hundred sixty-one".