420505242767 has 2 divisors, whose sum is σ = 420505242768. Its totient is φ = 420505242766.

The previous prime is 420505242631. The next prime is 420505242779. The reversal of 420505242767 is 767242505024.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 420505242767 - 2¹⁶ = 420505177231 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (420505242067) 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, 210252621383 + 210252621384.

It is an arithmetic number, because the mean of its divisors is an integer number (210252621384).

Almost surely, 2^420505242767 is an apocalyptic number.

420505242767 is a deficient number, since it is larger than the sum of its proper divisors (1).

420505242767 is an equidigital number, since it uses as much as digits as its factorization.

420505242767 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 940800, while the sum is 44.

The spelling of 420505242767 in words is "four hundred twenty billion, five hundred five million, two hundred forty-two thousand, seven hundred sixty-seven".