19445893227461 has 2 divisors, whose sum is σ = 19445893227462. Its totient is φ = 19445893227460.

The previous prime is 19445893227421. The next prime is 19445893227463. The reversal of 19445893227461 is 16472239854491.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18992870002561 + 453023224900 = 4358081^2 + 673070^2 .

It is a cyclic number.

It is not a de Polignac number, because 19445893227461 - 2²² = 19445889033157 is a prime.

Together with 19445893227463, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19445893227463) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9722946613730 + 9722946613731.

It is an arithmetic number, because the mean of its divisors is an integer number (9722946613731).

Almost surely, 2^{19445893227461} is an apocalyptic number.

It is an amenable number.

19445893227461 is a deficient number, since it is larger than the sum of its proper divisors (1).

19445893227461 is an equidigital number, since it uses as much as digits as its factorization.

19445893227461 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 104509440, while the sum is 65.

The spelling of 19445893227461 in words is "nineteen trillion, four hundred forty-five billion, eight hundred ninety-three million, two hundred twenty-seven thousand, four hundred sixty-one".