561768479 has 4 divisors (see below), whose sum is σ = 566056920. Its totient is φ = 557480040.

The previous prime is 561768463. The next prime is 561768499. The reversal of 561768479 is 974867165.

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

It is a cyclic number.

It is not a de Polignac number, because 561768479 - 2⁴ = 561768463 is a prime.

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 561768479.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561768439) 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, 2144024 + ... + 2144285.

It is an arithmetic number, because the mean of its divisors is an integer number (141514230).

Almost surely, 2^561768479 is an apocalyptic number.

561768479 is a deficient number, since it is larger than the sum of its proper divisors (4288441).

561768479 is a wasteful number, since it uses less digits than its factorization.

561768479 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4288440.

The product of its digits is 2540160, while the sum is 53.

The square root of 561768479 is about 23701.6556172770. The cubic root of 561768479 is about 825.1238156379.

The spelling of 561768479 in words is "five hundred sixty-one million, seven hundred sixty-eight thousand, four hundred seventy-nine".