6532404640 has 24 divisors (see below), whose sum is σ = 15432806340. Its totient is φ = 2612961792.

The previous prime is 6532404623. The next prime is 6532404647. The reversal of 6532404640 is 464042356.

It can be written as a sum of positive squares in 2 ways, for example, as 6014933136 + 517471504 = 77556^2 + 22748^2 .

It is a junction number, because it is equal to n+sod(n) for n = 6532404596 and 6532404605.

It is not an unprimeable number, because it can be changed into a prime (6532404647) 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, 20413605 + ... + 20413924.

Almost surely, 2^6532404640 is an apocalyptic number.

It is an amenable number.

6532404640 is an abundant number, since it is smaller than the sum of its proper divisors (8900401700).

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

6532404640 is a wasteful number, since it uses less digits than its factorization.

6532404640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40827544 (or 40827536 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 34.

The square root of 6532404640 is about 80823.2926822460. The cubic root of 6532404640 is about 1869.3517384645.

Adding to 6532404640 its reverse (464042356), we get a palindrome (6996446996).

The spelling of 6532404640 in words is "six billion, five hundred thirty-two million, four hundred four thousand, six hundred forty".