6562539649 has 2 divisors, whose sum is σ = 6562539650. Its totient is φ = 6562539648.

The previous prime is 6562539629. The next prime is 6562539673. The reversal of 6562539649 is 9469352656.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6548046400 + 14493249 = 80920^2 + 3807^2 .

It is a cyclic number.

It is not a de Polignac number, because 6562539649 - 2⁵ = 6562539617 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6562539649.

It is not a weakly prime, because it can be changed into another prime (6562539629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3281269824 + 3281269825.

It is an arithmetic number, because the mean of its divisors is an integer number (3281269825).

Almost surely, 2^6562539649 is an apocalyptic number.

It is an amenable number.

6562539649 is a deficient number, since it is larger than the sum of its proper divisors (1).

6562539649 is an equidigital number, since it uses as much as digits as its factorization.

6562539649 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10497600, while the sum is 55.

The square root of 6562539649 is about 81009.5034486695. The cubic root of 6562539649 is about 1872.2218672897.

The spelling of 6562539649 in words is "six billion, five hundred sixty-two million, five hundred thirty-nine thousand, six hundred forty-nine".