561178889 has 8 divisors (see below), whose sum is σ = 606680640. Its totient is φ = 517273776.

The previous prime is 561178883. The next prime is 561178921. The reversal of 561178889 is 988871165.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-561178889 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 561178889.

It is not an unprimeable number, because it can be changed into a prime (561178883) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 398429 + ... + 399834.

It is an arithmetic number, because the mean of its divisors is an integer number (75835080).

Almost surely, 2^561178889 is an apocalyptic number.

It is an amenable number.

561178889 is a deficient number, since it is larger than the sum of its proper divisors (45501751).

561178889 is a wasteful number, since it uses less digits than its factorization.

561178889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 798319.

The product of its digits is 967680, while the sum is 53.

The square root of 561178889 is about 23689.2146134058. The cubic root of 561178889 is about 824.8350519327.

The spelling of 561178889 in words is "five hundred sixty-one million, one hundred seventy-eight thousand, eight hundred eighty-nine".