6562640897 has 4 divisors (see below), whose sum is σ = 6670225236. Its totient is φ = 6455056560.

The previous prime is 6562640893. The next prime is 6562640911. The reversal of 6562640897 is 7980462656.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3647072881 + 2915568016 = 60391^2 + 53996^2 .

It is a cyclic number.

It is not a de Polignac number, because 6562640897 - 2² = 6562640893 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6562640893) 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, 53792078 + ... + 53792199.

It is an arithmetic number, because the mean of its divisors is an integer number (1667556309).

Almost surely, 2^6562640897 is an apocalyptic number.

It is an amenable number.

6562640897 is a deficient number, since it is larger than the sum of its proper divisors (107584339).

6562640897 is a wasteful number, since it uses less digits than its factorization.

6562640897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107584338.

The product of its (nonzero) digits is 4354560, while the sum is 53.

The square root of 6562640897 is about 81010.1283605945. The cubic root of 6562640897 is about 1872.2314955615.

The spelling of 6562640897 in words is "six billion, five hundred sixty-two million, six hundred forty thousand, eight hundred ninety-seven".