428323816955 has 4 divisors (see below), whose sum is σ = 513988580352. Its totient is φ = 342659053560.

The previous prime is 428323816913. The next prime is 428323816969. The reversal of 428323816955 is 559618323824.

It is a happy number.

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

It is not a de Polignac number, because 428323816955 - 2¹⁴ = 428323800571 is a prime.

It is a super-2 number, since 2×428323816955² (a number of 24 digits) contains 22 as substring.

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 428323816955.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42832381691 + ... + 42832381700.

It is an arithmetic number, because the mean of its divisors is an integer number (128497145088).

Almost surely, 2^428323816955 is an apocalyptic number.

428323816955 is a deficient number, since it is larger than the sum of its proper divisors (85664763397).

428323816955 is an equidigital number, since it uses as much as digits as its factorization.

428323816955 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85664763396.

The product of its digits is 12441600, while the sum is 56.

The spelling of 428323816955 in words is "four hundred twenty-eight billion, three hundred twenty-three million, eight hundred sixteen thousand, nine hundred fifty-five".