2600320563 has 20 divisors (see below), whose sum is σ = 4088875560. Its totient is φ = 1642306752.

The previous prime is 2600320559. The next prime is 2600320633. The reversal of 2600320563 is 3650230062.

2600320563 is a `hidden beast` number, since 2 + 600 + 3 + 2 + 0 + 56 + 3 = 666.

It is not a de Polignac number, because 2600320563 - 2² = 2600320559 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (2600320963) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 843270 + ... + 846347.

It is an arithmetic number, because the mean of its divisors is an integer number (204443778).

Almost surely, 2^2600320563 is an apocalyptic number.

2600320563 is a deficient number, since it is larger than the sum of its proper divisors (1488554997).

2600320563 is a wasteful number, since it uses less digits than its factorization.

2600320563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1689648 (or 1689639 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 27.

The square root of 2600320563 is about 50993.3384178757. The cubic root of 2600320563 is about 1375.1253770853.

The spelling of 2600320563 in words is "two billion, six hundred million, three hundred twenty thousand, five hundred sixty-three".