6563121245 has 16 divisors (see below), whose sum is σ = 7915555200. Its totient is φ = 5224025664.

The previous prime is 6563121221. The next prime is 6563121263. The reversal of 6563121245 is 5421213656.

It is a cyclic number.

It is not a de Polignac number, because 6563121245 - 2¹² = 6563117149 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 845954 + ... + 853676.

It is an arithmetic number, because the mean of its divisors is an integer number (494722200).

Almost surely, 2^6563121245 is an apocalyptic number.

It is an amenable number.

6563121245 is a deficient number, since it is larger than the sum of its proper divisors (1352433955).

6563121245 is a wasteful number, since it uses less digits than its factorization.

6563121245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8564.

The product of its digits is 43200, while the sum is 35.

The square root of 6563121245 is about 81013.0930467415. The cubic root of 6563121245 is about 1872.2771733472.

The spelling of 6563121245 in words is "six billion, five hundred sixty-three million, one hundred twenty-one thousand, two hundred forty-five".