12641885401 has 2 divisors, whose sum is σ = 12641885402. Its totient is φ = 12641885400.

The previous prime is 12641885357. The next prime is 12641885411. The reversal of 12641885401 is 10458814621.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7632643225 + 5009242176 = 87365^2 + 70776^2 .

It is a cyclic number.

It is not a de Polignac number, because 12641885401 - 2¹⁵ = 12641852633 is a prime.

It is not a weakly prime, because it can be changed into another prime (12641885411) 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 as a sum of consecutive naturals, namely, 6320942700 + 6320942701.

It is an arithmetic number, because the mean of its divisors is an integer number (6320942701).

Almost surely, 2^12641885401 is an apocalyptic number.

It is an amenable number.

12641885401 is a deficient number, since it is larger than the sum of its proper divisors (1).

12641885401 is an equidigital number, since it uses as much as digits as its factorization.

12641885401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 61440, while the sum is 40.

The spelling of 12641885401 in words is "twelve billion, six hundred forty-one million, eight hundred eighty-five thousand, four hundred one".