561326858 has 16 divisors (see below), whose sum is σ = 869944320. Its totient is φ = 271362000.

The previous prime is 561326851. The next prime is 561326917. The reversal of 561326858 is 858623165.

It is not an unprimeable number, because it can be changed into a prime (561326851) 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, 77183 + ... + 84141.

It is an arithmetic number, because the mean of its divisors is an integer number (54371520).

Almost surely, 2^561326858 is an apocalyptic number.

561326858 is a deficient number, since it is larger than the sum of its proper divisors (308617462).

561326858 is a wasteful number, since it uses less digits than its factorization.

561326858 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8293.

The product of its digits is 345600, while the sum is 44.

The square root of 561326858 is about 23692.3375376935. The cubic root of 561326858 is about 824.9075417659.

The spelling of 561326858 in words is "five hundred sixty-one million, three hundred twenty-six thousand, eight hundred fifty-eight".