561117854 has 16 divisors (see below), whose sum is σ = 921337200. Its totient is φ = 254180160.

The previous prime is 561117811. The next prime is 561117859. The reversal of 561117854 is 458711165.

It is a super-3 number, since 3×561117854³ (a number of 27 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561117859) 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 7 ways as a sum of consecutive naturals, for example, 37079 + ... + 49970.

It is an arithmetic number, because the mean of its divisors is an integer number (57583575).

Almost surely, 2^561117854 is an apocalyptic number.

561117854 is a deficient number, since it is larger than the sum of its proper divisors (360219346).

561117854 is a wasteful number, since it uses less digits than its factorization.

561117854 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87355.

The product of its digits is 33600, while the sum is 38.

The square root of 561117854 is about 23687.9263338942. The cubic root of 561117854 is about 824.8051472483.

The spelling of 561117854 in words is "five hundred sixty-one million, one hundred seventeen thousand, eight hundred fifty-four".