521605465652 has 24 divisors (see below), whose sum is σ = 921401762400. Its totient is φ = 258348143840.

The previous prime is 521605465631. The next prime is 521605465669. The reversal of 521605465652 is 256564506125.

It is a junction number, because it is equal to n+sod(n) for n = 521605465597 and 521605465606.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8507627 + ... + 8568717.

It is an arithmetic number, because the mean of its divisors is an integer number (38391740100).

Almost surely, 2^521605465652 is an apocalyptic number.

It is an amenable number.

521605465652 is a deficient number, since it is larger than the sum of its proper divisors (399796296748).

521605465652 is a wasteful number, since it uses less digits than its factorization.

521605465652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81151 (or 81149 counting only the distinct ones).

The product of its (nonzero) digits is 2160000, while the sum is 47.

The spelling of 521605465652 in words is "five hundred twenty-one billion, six hundred five million, four hundred sixty-five thousand, six hundred fifty-two".