428018834525 has 6 divisors (see below), whose sum is σ = 530743354842. Its totient is φ = 342415067600.

The previous prime is 428018834513. The next prime is 428018834527. The reversal of 428018834525 is 525438810824.

It can be written as a sum of positive squares in 3 ways, for example, as 3329405401 + 424689429124 = 57701^2 + 651682^2 .

It is not a de Polignac number, because 428018834525 - 2¹⁴ = 428018818141 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (428018834527) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8560376666 + ... + 8560376715.

It is an arithmetic number, because the mean of its divisors is an integer number (88457225807).

Almost surely, 2^428018834525 is an apocalyptic number.

It is an amenable number.

428018834525 is a deficient number, since it is larger than the sum of its proper divisors (102724520317).

428018834525 is a wasteful number, since it uses less digits than its factorization.

428018834525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17120753391 (or 17120753386 counting only the distinct ones).

The product of its (nonzero) digits is 2457600, while the sum is 50.

The spelling of 428018834525 in words is "four hundred twenty-eight billion, eighteen million, eight hundred thirty-four thousand, five hundred twenty-five".