19142680661281 has 2 divisors, whose sum is σ = 19142680661282. Its totient is φ = 19142680661280.

The previous prime is 19142680661243. The next prime is 19142680661303. The reversal of 19142680661281 is 18216608624191.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10041236401681 + 9101444259600 = 3168791^2 + 3016860^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19142680661281 is a prime.

It is a super-2 number, since 2×19142680661281² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (19142680661231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9571340330640 + 9571340330641.

It is an arithmetic number, because the mean of its divisors is an integer number (9571340330641).

Almost surely, 2^{19142680661281} is an apocalyptic number.

It is an amenable number.

19142680661281 is a deficient number, since it is larger than the sum of its proper divisors (1).

19142680661281 is an equidigital number, since it uses as much as digits as its factorization.

19142680661281 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1990656, while the sum is 55.

The spelling of 19142680661281 in words is "nineteen trillion, one hundred forty-two billion, six hundred eighty million, six hundred sixty-one thousand, two hundred eighty-one".