6563008642 has 4 divisors (see below), whose sum is σ = 9844512966. Its totient is φ = 3281504320.

The previous prime is 6563008609. The next prime is 6563008643. The reversal of 6563008642 is 2468003656.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 6274382521 + 288626121 = 79211^2 + 16989^2 .

It is a junction number, because it is equal to n+sod(n) for n = 6563008595 and 6563008604.

It is not an unprimeable number, because it can be changed into a prime (6563008643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1640752159 + ... + 1640752162.

Almost surely, 2^6563008642 is an apocalyptic number.

6563008642 is a deficient number, since it is larger than the sum of its proper divisors (3281504324).

6563008642 is a wasteful number, since it uses less digits than its factorization.

6563008642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3281504323.

The product of its (nonzero) digits is 207360, while the sum is 40.

The square root of 6563008642 is about 81012.3980758501. The cubic root of 6563008642 is about 1872.2664657776.

The spelling of 6563008642 in words is "six billion, five hundred sixty-three million, eight thousand, six hundred forty-two".