420664430543 has 4 divisors (see below), whose sum is σ = 480759349200. Its totient is φ = 360569511888.

The previous prime is 420664430539. The next prime is 420664430603. The reversal of 420664430543 is 345034466024.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 420664430543 - 2² = 420664430539 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 420664430543.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420664430503) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30047459318 + ... + 30047459331.

It is an arithmetic number, because the mean of its divisors is an integer number (120189837300).

Almost surely, 2^420664430543 is an apocalyptic number.

420664430543 is a deficient number, since it is larger than the sum of its proper divisors (60094918657).

420664430543 is an equidigital number, since it uses as much as digits as its factorization.

420664430543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60094918656.

The product of its (nonzero) digits is 829440, while the sum is 41.

Adding to 420664430543 its reverse (345034466024), we get a palindrome (765698896567).

The spelling of 420664430543 in words is "four hundred twenty billion, six hundred sixty-four million, four hundred thirty thousand, five hundred forty-three".