8428646525 has 24 divisors (see below), whose sum is σ = 11847887520. Its totient is φ = 5896635840.

The previous prime is 8428646521. The next prime is 8428646531. The reversal of 8428646525 is 5256468248.

It is not a de Polignac number, because 8428646525 - 2² = 8428646521 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8428646521) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 676307 + ... + 688656.

It is an arithmetic number, because the mean of its divisors is an integer number (493661980).

Almost surely, 2^8428646525 is an apocalyptic number.

It is an amenable number.

8428646525 is a deficient number, since it is larger than the sum of its proper divisors (3419240995).

8428646525 is a wasteful number, since it uses less digits than its factorization.

8428646525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1365005 (or 1365000 counting only the distinct ones).

The product of its digits is 3686400, while the sum is 50.

The square root of 8428646525 is about 91807.6604919219. The cubic root of 8428646525 is about 2035.1009031419.

The spelling of 8428646525 in words is "eight billion, four hundred twenty-eight million, six hundred forty-six thousand, five hundred twenty-five".