561743832857 has 4 divisors (see below), whose sum is σ = 561944673636. Its totient is φ = 561542992080.

The previous prime is 561743832847. The next prime is 561743832901. The reversal of 561743832857 is 758238347165.

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

It can be written as a sum of positive squares in 2 ways, for example, as 228463924441 + 333279908416 = 477979^2 + 577304^2 .

It is a cyclic number.

It is not a de Polignac number, because 561743832857 - 2²² = 561739638553 is a prime.

It is a super-2 number, since 2×561743832857² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 561743832796 and 561743832805.

It is not an unprimeable number, because it can be changed into a prime (561743832847) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 100416194 + ... + 100421787.

It is an arithmetic number, because the mean of its divisors is an integer number (140486168409).

Almost surely, 2^561743832857 is an apocalyptic number.

It is an amenable number.

561743832857 is a deficient number, since it is larger than the sum of its proper divisors (200840779).

561743832857 is a wasteful number, since it uses less digits than its factorization.

561743832857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200840778.

The product of its digits is 33868800, while the sum is 59.

The spelling of 561743832857 in words is "five hundred sixty-one billion, seven hundred forty-three million, eight hundred thirty-two thousand, eight hundred fifty-seven".