561783945679 has 8 divisors (see below), whose sum is σ = 612882558288. Its totient is φ = 510689890560.

The previous prime is 561783945673. The next prime is 561783945683. The reversal of 561783945679 is 976549387165.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 561783945679 - 2¹¹ = 561783943631 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561783945673) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 879042 + ... + 1377055.

It is an arithmetic number, because the mean of its divisors is an integer number (76610319786).

Almost surely, 2^561783945679 is an apocalyptic number.

561783945679 is a deficient number, since it is larger than the sum of its proper divisors (51098612609).

561783945679 is a wasteful number, since it uses less digits than its factorization.

561783945679 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2278745.

The product of its digits is 342921600, while the sum is 70.

The spelling of 561783945679 in words is "five hundred sixty-one billion, seven hundred eighty-three million, nine hundred forty-five thousand, six hundred seventy-nine".