646524232832 has 32 divisors (see below), whose sum is σ = 1288146744300. Its totient is φ = 323224657920.

The previous prime is 646524232831. The next prime is 646524232883. The reversal of 646524232832 is 238232425646.

It can be written as a sum of positive squares in 2 ways, for example, as 646506051136 + 18181696 = 804056^2 + 4264^2 .

It is a tau number, because it is divible by the number of its divisors (32).

It is a super-2 number, since 2×646524232832² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (646524232831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 833144 + ... + 1409672.

Almost surely, 2^646524232832 is an apocalyptic number.

It is an amenable number.

646524232832 is a deficient number, since it is larger than the sum of its proper divisors (641622511468).

646524232832 is an equidigital number, since it uses as much as digits as its factorization.

646524232832 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 585304 (or 585292 counting only the distinct ones).

The product of its digits is 3317760, while the sum is 47.

The spelling of 646524232832 in words is "six hundred forty-six billion, five hundred twenty-four million, two hundred thirty-two thousand, eight hundred thirty-two".