12956561819701 has 2 divisors, whose sum is σ = 12956561819702. Its totient is φ = 12956561819700.

The previous prime is 12956561819689. The next prime is 12956561819711. The reversal of 12956561819701 is 10791816565921.

12956561819701 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11156094325476 + 1800467494225 = 3340074^2 + 1341815^2 .

It is a cyclic number.

It is not a de Polignac number, because 12956561819701 - 2²⁵ = 12956528265269 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12956561819701.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12956561819711) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6478280909850 + 6478280909851.

It is an arithmetic number, because the mean of its divisors is an integer number (6478280909851).

Almost surely, 2^{12956561819701} is an apocalyptic number.

It is an amenable number.

12956561819701 is a deficient number, since it is larger than the sum of its proper divisors (1).

12956561819701 is an equidigital number, since it uses as much as digits as its factorization.

12956561819701 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8164800, while the sum is 61.

The spelling of 12956561819701 in words is "twelve trillion, nine hundred fifty-six billion, five hundred sixty-one million, eight hundred nineteen thousand, seven hundred one".