428668793543 has 2 divisors, whose sum is σ = 428668793544. Its totient is φ = 428668793542.

The previous prime is 428668793459. The next prime is 428668793551. The reversal of 428668793543 is 345397866824.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-428668793543 is a prime.

It is a super-2 number, since 2×428668793543² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 428668793543.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (428668795543) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 214334396771 + 214334396772.

It is an arithmetic number, because the mean of its divisors is an integer number (214334396772).

Almost surely, 2^428668793543 is an apocalyptic number.

428668793543 is a deficient number, since it is larger than the sum of its proper divisors (1).

428668793543 is an equidigital number, since it uses as much as digits as its factorization.

428668793543 is an evil number, because the sum of its binary digits is even.

The product of its digits is 209018880, while the sum is 65.

The spelling of 428668793543 in words is "four hundred twenty-eight billion, six hundred sixty-eight million, seven hundred ninety-three thousand, five hundred forty-three".