521568842428 has 12 divisors (see below), whose sum is σ = 913159058112. Its totient is φ = 260666254400.

The previous prime is 521568842423. The next prime is 521568842461. The reversal of 521568842428 is 824248865125.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (521568842423) 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, 29531773 + ... + 29549428.

It is an arithmetic number, because the mean of its divisors is an integer number (76096588176).

Almost surely, 2^521568842428 is an apocalyptic number.

It is an amenable number.

521568842428 is a deficient number, since it is larger than the sum of its proper divisors (391590215684).

521568842428 is a wasteful number, since it uses less digits than its factorization.

521568842428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59083412 (or 59083410 counting only the distinct ones).

The product of its digits is 9830400, while the sum is 55.

The spelling of 521568842428 in words is "five hundred twenty-one billion, five hundred sixty-eight million, eight hundred forty-two thousand, four hundred twenty-eight".