561856124 has 6 divisors (see below), whose sum is σ = 983248224. Its totient is φ = 280928060.

The previous prime is 561856123. The next prime is 561856129. The reversal of 561856124 is 421658165.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561856123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70232012 + ... + 70232019.

It is an arithmetic number, because the mean of its divisors is an integer number (163874704).

Almost surely, 2^561856124 is an apocalyptic number.

It is an amenable number.

561856124 is a deficient number, since it is larger than the sum of its proper divisors (421392100).

561856124 is a wasteful number, since it uses less digits than its factorization.

561856124 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140464035 (or 140464033 counting only the distinct ones).

The product of its digits is 57600, while the sum is 38.

The square root of 561856124 is about 23703.5044666395. The cubic root of 561856124 is about 825.1667243087.

The spelling of 561856124 in words is "five hundred sixty-one million, eight hundred fifty-six thousand, one hundred twenty-four".