6530454640 has 20 divisors (see below), whose sum is σ = 15183307224. Its totient is φ = 2612181824.

The previous prime is 6530454631. The next prime is 6530454683. The reversal of 6530454640 is 464540356.

It is a tau number, because it is divible by the number of its divisors (20).

It is a self number, because there is not a number n which added to its sum of digits gives 6530454640.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40815262 + ... + 40815421.

Almost surely, 2^6530454640 is an apocalyptic number.

It is an amenable number.

6530454640 is an abundant number, since it is smaller than the sum of its proper divisors (8652852584).

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

6530454640 is a wasteful number, since it uses less digits than its factorization.

6530454640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81630696 (or 81630690 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 37.

The square root of 6530454640 is about 80811.2284277377. The cubic root of 6530454640 is about 1869.1657120895.

Adding to 6530454640 its reverse (464540356), we get a palindrome (6994994996).

The spelling of 6530454640 in words is "six billion, five hundred thirty million, four hundred fifty-four thousand, six hundred forty".