428646864365 has 4 divisors (see below), whose sum is σ = 514376237244. Its totient is φ = 342917491488.

The previous prime is 428646864341. The next prime is 428646864389. The reversal of 428646864365 is 563468646824.

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

It is an interprime number because it is at equal distance from previous prime (428646864341) and next prime (428646864389).

It can be written as a sum of positive squares in 2 ways, for example, as 281004949801 + 147641914564 = 530099^2 + 384242^2 .

It is a cyclic number.

It is not a de Polignac number, because 428646864365 - 2¹² = 428646860269 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 428646864298 and 428646864307.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42864686432 + ... + 42864686441.

It is an arithmetic number, because the mean of its divisors is an integer number (128594059311).

Almost surely, 2^428646864365 is an apocalyptic number.

It is an amenable number.

428646864365 is a deficient number, since it is larger than the sum of its proper divisors (85729372879).

428646864365 is an equidigital number, since it uses as much as digits as its factorization.

428646864365 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85729372878.

The product of its digits is 159252480, while the sum is 62.

The spelling of 428646864365 in words is "four hundred twenty-eight billion, six hundred forty-six million, eight hundred sixty-four thousand, three hundred sixty-five".