819665532 has 54 divisors (see below), whose sum is σ = 2410212168. Its totient is φ = 234189648.

The previous prime is 819665521. The next prime is 819665533. The reversal of 819665532 is 235566918.

819665532 is a `hidden beast` number, since 8 + 1 + 96 + 6 + 553 + 2 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (819665533) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 230568 + ... + 234095.

Almost surely, 2^819665532 is an apocalyptic number.

It is an amenable number.

819665532 is an abundant number, since it is smaller than the sum of its proper divisors (1590546636).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

819665532 is a wasteful number, since it uses less digits than its factorization.

819665532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 464687 (or 464675 counting only the distinct ones).

The product of its digits is 388800, while the sum is 45.

The square root of 819665532 is about 28629.8014663043. The cubic root of 819665532 is about 935.8628853501.

The spelling of 819665532 in words is "eight hundred nineteen million, six hundred sixty-five thousand, five hundred thirty-two".