420345550543 has 2 divisors, whose sum is σ = 420345550544. Its totient is φ = 420345550542.

The previous prime is 420345550463. The next prime is 420345550549. The reversal of 420345550543 is 345055543024.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 420345550543 - 2¹⁷ = 420345419471 is a prime.

It is a super-3 number, since 3×420345550543³ (a number of 36 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a junction number, because it is equal to n+sod(n) for n = 420345550496 and 420345550505.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (420345550549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210172775271 + 210172775272.

It is an arithmetic number, because the mean of its divisors is an integer number (210172775272).

Almost surely, 2^420345550543 is an apocalyptic number.

420345550543 is a deficient number, since it is larger than the sum of its proper divisors (1).

420345550543 is an equidigital number, since it uses as much as digits as its factorization.

420345550543 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 720000, while the sum is 40.

The spelling of 420345550543 in words is "four hundred twenty billion, three hundred forty-five million, five hundred fifty thousand, five hundred forty-three".