561643301182667 has 4 divisors (see below), whose sum is σ = 612701783108376. Its totient is φ = 510584819256960.

The previous prime is 561643301182651. The next prime is 561643301182669. The reversal of 561643301182667 is 766281103346165.

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

It is a cyclic number.

It is not a de Polignac number, because 561643301182667 - 2⁴ = 561643301182651 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (561643301182669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25529240962838 + ... + 25529240962859.

It is an arithmetic number, because the mean of its divisors is an integer number (153175445777094).

Almost surely, 2^{561643301182667} is an apocalyptic number.

561643301182667 is a deficient number, since it is larger than the sum of its proper divisors (51058481925709).

561643301182667 is a wasteful number, since it uses less digits than its factorization.

561643301182667 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51058481925708.

The product of its (nonzero) digits is 26127360, while the sum is 59.

The spelling of 561643301182667 in words is "five hundred sixty-one trillion, six hundred forty-three billion, three hundred one million, one hundred eighty-two thousand, six hundred sixty-seven".