421363555603 has 2 divisors, whose sum is σ = 421363555604. Its totient is φ = 421363555602.

The previous prime is 421363555601. The next prime is 421363555643. The reversal of 421363555603 is 306555363124.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 421363555603 - 2¹ = 421363555601 is a prime.

Together with 421363555601, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 421363555603.

It is not a weakly prime, because it can be changed into another prime (421363555601) 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, 210681777801 + 210681777802.

It is an arithmetic number, because the mean of its divisors is an integer number (210681777802).

Almost surely, 2^421363555603 is an apocalyptic number.

421363555603 is a deficient number, since it is larger than the sum of its proper divisors (1).

421363555603 is an equidigital number, since it uses as much as digits as its factorization.

421363555603 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 972000, while the sum is 43.

The spelling of 421363555603 in words is "four hundred twenty-one billion, three hundred sixty-three million, five hundred fifty-five thousand, six hundred three".