1421688547441 has 2 divisors, whose sum is σ = 1421688547442. Its totient is φ = 1421688547440.

The previous prime is 1421688547381. The next prime is 1421688547451. The reversal of 1421688547441 is 1447458861241.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 812664387441 + 609024160000 = 901479^2 + 780400^2 .

It is a cyclic number.

It is not a de Polignac number, because 1421688547441 - 2⁷ = 1421688547313 is a prime.

It is not a weakly prime, because it can be changed into another prime (1421688547451) 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, 710844273720 + 710844273721.

It is an arithmetic number, because the mean of its divisors is an integer number (710844273721).

Almost surely, 2^{1421688547441} is an apocalyptic number.

It is an amenable number.

1421688547441 is a deficient number, since it is larger than the sum of its proper divisors (1).

1421688547441 is an equidigital number, since it uses as much as digits as its factorization.

1421688547441 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6881280, while the sum is 55.

The spelling of 1421688547441 in words is "one trillion, four hundred twenty-one billion, six hundred eighty-eight million, five hundred forty-seven thousand, four hundred forty-one".