428896851121 has 4 divisors (see below), whose sum is σ = 428904772852. Its totient is φ = 428888929392.

The previous prime is 428896851077. The next prime is 428896851217. The reversal of 428896851121 is 121158698824.

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

It can be written as a sum of positive squares in 2 ways, for example, as 414768200625 + 14128650496 = 644025^2 + 118864^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-428896851121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (428896851221) 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, 3879090 + ... + 3988123.

It is an arithmetic number, because the mean of its divisors is an integer number (107226193213).

Almost surely, 2^428896851121 is an apocalyptic number.

It is an amenable number.

428896851121 is a deficient number, since it is larger than the sum of its proper divisors (7921731).

428896851121 is an equidigital number, since it uses as much as digits as its factorization.

428896851121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7921730.

The product of its digits is 2211840, while the sum is 55.

The spelling of 428896851121 in words is "four hundred twenty-eight billion, eight hundred ninety-six million, eight hundred fifty-one thousand, one hundred twenty-one".