561666290766048 has 144 divisors (see below), whose sum is σ = 1766592286595136. Its totient is φ = 168149575572480.

The previous prime is 561666290765977. The next prime is 561666290766157. The reversal of 561666290766048 is 840667092666165.

It is a tau number, because it is divible by the number of its divisors (144).

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2027127768 + ... + 2027404823.

It is an arithmetic number, because the mean of its divisors is an integer number (12268001990244).

Almost surely, 2^{561666290766048} is an apocalyptic number.

It is an amenable number.

561666290766048 is an abundant number, since it is smaller than the sum of its proper divisors (1204925995829088).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

561666290766048 is a wasteful number, since it uses less digits than its factorization.

561666290766048 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4054532657 (or 4054532646 counting only the distinct ones).

The product of its (nonzero) digits is 940584960, while the sum is 72.

The spelling of 561666290766048 in words is "five hundred sixty-one trillion, six hundred sixty-six billion, two hundred ninety million, seven hundred sixty-six thousand, forty-eight".