424440420661 has 2 divisors, whose sum is σ = 424440420662. Its totient is φ = 424440420660.

The previous prime is 424440420637. The next prime is 424440420713. The reversal of 424440420661 is 166024044424.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 356426910225 + 68013510436 = 597015^2 + 260794^2 .

It is a cyclic number.

It is not a de Polignac number, because 424440420661 - 2¹¹ = 424440418613 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 424440420661.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (424440427661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 212220210330 + 212220210331.

It is an arithmetic number, because the mean of its divisors is an integer number (212220210331).

Almost surely, 2^424440420661 is an apocalyptic number.

It is an amenable number.

424440420661 is a deficient number, since it is larger than the sum of its proper divisors (1).

424440420661 is an equidigital number, since it uses as much as digits as its factorization.

424440420661 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 147456, while the sum is 37.

The spelling of 424440420661 in words is "four hundred twenty-four billion, four hundred forty million, four hundred twenty thousand, six hundred sixty-one".