421363555643 has 2 divisors, whose sum is σ = 421363555644. Its totient is φ = 421363555642.

The previous prime is 421363555603. The next prime is 421363555661. The reversal of 421363555643 is 346555363124.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-421363555643 is a prime.

It is a super-2 number, since 2×421363555643² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (421363555603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210681777821 + 210681777822.

It is an arithmetic number, because the mean of its divisors is an integer number (210681777822).

Almost surely, 2^421363555643 is an apocalyptic number.

421363555643 is a deficient number, since it is larger than the sum of its proper divisors (1).

421363555643 is an equidigital number, since it uses as much as digits as its factorization.

421363555643 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3888000, while the sum is 47.

The spelling of 421363555643 in words is "four hundred twenty-one billion, three hundred sixty-three million, five hundred fifty-five thousand, six hundred forty-three".