561785841 has 32 divisors (see below), whose sum is σ = 856859520. Its totient is φ = 363569472.

The previous prime is 561785839. The next prime is 561785843. The reversal of 561785841 is 148587165.

561785841 is a `hidden beast` number, since 5 + 61 + 7 + 8 + 584 + 1 = 666.

It is an interprime number because it is at equal distance from previous prime (561785839) and next prime (561785843).

It is not a de Polignac number, because 561785841 - 2¹ = 561785839 is a prime.

It is a super-2 number, since 2×561785841² = 631206662296154562, which contains 22 as substring.

It is a zygodrome in base 3.

It is not an unprimeable number, because it can be changed into a prime (561785843) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 199455 + ... + 202251.

It is an arithmetic number, because the mean of its divisors is an integer number (26776860).

Almost surely, 2^561785841 is an apocalyptic number.

It is an amenable number.

561785841 is a deficient number, since it is larger than the sum of its proper divisors (295073679).

561785841 is a wasteful number, since it uses less digits than its factorization.

561785841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3022 (or 3016 counting only the distinct ones).

The product of its digits is 268800, while the sum is 45.

The square root of 561785841 is about 23702.0218757810. The cubic root of 561785841 is about 825.1323159677.

The spelling of 561785841 in words is "five hundred sixty-one million, seven hundred eighty-five thousand, eight hundred forty-one".