6316561 has 4 divisors (see below), whose sum is σ = 6349824. Its totient is φ = 6283300.

The previous prime is 6316553. The next prime is 6316579. The reversal of 6316561 is 1656136.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 6316561 - 2³ = 6316553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6316861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16345 + ... + 16726.

It is an arithmetic number, because the mean of its divisors is an integer number (1587456).

Almost surely, 2^6316561 is an apocalyptic number.

It is an amenable number.

6316561 is a deficient number, since it is larger than the sum of its proper divisors (33263).

6316561 is a wasteful number, since it uses less digits than its factorization.

6316561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33262.

The product of its digits is 3240, while the sum is 28.

The square root of 6316561 is about 2513.2769445487. The cubic root of 6316561 is about 184.8531681284.

The spelling of 6316561 in words is "six million, three hundred sixteen thousand, five hundred sixty-one".