561741999 has 32 divisors (see below), whose sum is σ = 976066560. Its totient is φ = 278871552.

The previous prime is 561741967. The next prime is 561742001. The reversal of 561741999 is 999147165.

561741999 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 561741999 - 2⁵ = 561741967 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561741959) 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, 55879 + ... + 65160.

It is an arithmetic number, because the mean of its divisors is an integer number (30502080).

Almost surely, 2^561741999 is an apocalyptic number.

561741999 is a deficient number, since it is larger than the sum of its proper divisors (414324561).

561741999 is a wasteful number, since it uses less digits than its factorization.

561741999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121079.

The product of its digits is 612360, while the sum is 51.

The square root of 561741999 is about 23701.0969999281. The cubic root of 561741999 is about 825.1108508533.

The spelling of 561741999 in words is "five hundred sixty-one million, seven hundred forty-one thousand, nine hundred ninety-nine".