561823818287 has 8 divisors (see below), whose sum is σ = 580019441280. Its totient is φ = 543632712480.

The previous prime is 561823818229. The next prime is 561823818307. The reversal of 561823818287 is 782818328165.

561823818287 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 561823818287 - 2²² = 561819623983 is a prime.

It is a super-2 number, since 2×561823818287² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561823811287) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 875612 + ... + 1374897.

It is an arithmetic number, because the mean of its divisors is an integer number (72502430160).

Almost surely, 2^561823818287 is an apocalyptic number.

561823818287 is a deficient number, since it is larger than the sum of its proper divisors (18195622993).

561823818287 is a wasteful number, since it uses less digits than its factorization.

561823818287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2258593.

The product of its digits is 10321920, while the sum is 59.

The spelling of 561823818287 in words is "five hundred sixty-one billion, eight hundred twenty-three million, eight hundred eighteen thousand, two hundred eighty-seven".