806474045521 has 27 divisors (see below), whose sum is σ = 849422123049. Its totient is φ = 765668051400.

The previous prime is 806474045519. The next prime is 806474045527. The reversal of 806474045521 is 125540474608.

The square root of 806474045521 is 898039.

It is a perfect power (a square), and thus also a powerful number.

806474045521 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 806474045521 - 2¹ = 806474045519 is a prime.

It is a super-2 number, since 2×806474045521² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (806474045527) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 1642513086 + ... + 1642513576.

Almost surely, 2^806474045521 is an apocalyptic number.

806474045521 is the 898039-th square number.

806474045521 is the 449020-th centered octagonal number.

It is an amenable number.

806474045521 is a deficient number, since it is larger than the sum of its proper divisors (42948077528).

806474045521 is an frugal number, since it uses more digits than its factorization.

806474045521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1162 (or 581 counting only the distinct ones).

The product of its (nonzero) digits is 1075200, while the sum is 46.

The spelling of 806474045521 in words is "eight hundred six billion, four hundred seventy-four million, forty-five thousand, five hundred twenty-one".