6495566537 has 16 divisors (see below), whose sum is σ = 7085817600. Its totient is φ = 5930910720.

The previous prime is 6495566513. The next prime is 6495566549. The reversal of 6495566537 is 7356655946.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 6495566537 - 2¹² = 6495562441 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6495566557) 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, 307712 + ... + 328142.

It is an arithmetic number, because the mean of its divisors is an integer number (442863600).

Almost surely, 2^6495566537 is an apocalyptic number.

It is an amenable number.

6495566537 is a deficient number, since it is larger than the sum of its proper divisors (590251063).

6495566537 is a wasteful number, since it uses less digits than its factorization.

6495566537 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21056.

The product of its digits is 20412000, while the sum is 56.

The square root of 6495566537 is about 80595.0776226439. The cubic root of 6495566537 is about 1865.8311754899.

The spelling of 6495566537 in words is "six billion, four hundred ninety-five million, five hundred sixty-six thousand, five hundred thirty-seven".