561743832821 has 8 divisors (see below), whose sum is σ = 573967438464. Its totient is φ = 549531544320.

The previous prime is 561743832763. The next prime is 561743832847. The reversal of 561743832821 is 128238347165.

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 561743832821 - 2¹⁸ = 561743570677 is a prime.

It is a super-2 number, since 2×561743832821² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 561743832821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561743832421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2728895 + ... + 2927516.

It is an arithmetic number, because the mean of its divisors is an integer number (71745929808).

Almost surely, 2^561743832821 is an apocalyptic number.

It is an amenable number.

561743832821 is a deficient number, since it is larger than the sum of its proper divisors (12223605643).

561743832821 is a wasteful number, since it uses less digits than its factorization.

561743832821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5658571.

The product of its digits is 1935360, while the sum is 50.

The spelling of 561743832821 in words is "five hundred sixty-one billion, seven hundred forty-three million, eight hundred thirty-two thousand, eight hundred twenty-one".