6530720487 has 16 divisors (see below), whose sum is σ = 9094982400. Its totient is φ = 4160501312.

The previous prime is 6530720479. The next prime is 6530720507. The reversal of 6530720487 is 7840270356.

It is a cyclic number.

It is not a de Polignac number, because 6530720487 - 2³ = 6530720479 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6530720447) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27268 + ... + 117494.

It is an arithmetic number, because the mean of its divisors is an integer number (568436400).

Almost surely, 2^6530720487 is an apocalyptic number.

6530720487 is a deficient number, since it is larger than the sum of its proper divisors (2564261913).

6530720487 is a wasteful number, since it uses less digits than its factorization.

6530720487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91302.

The product of its (nonzero) digits is 282240, while the sum is 42.

The square root of 6530720487 is about 80812.8732752400. The cubic root of 6530720487 is about 1869.1910755790.

The spelling of 6530720487 in words is "six billion, five hundred thirty million, seven hundred twenty thousand, four hundred eighty-seven".