561261364 has 12 divisors (see below), whose sum is σ = 1024912224. Its totient is φ = 268429304.

The previous prime is 561261353. The next prime is 561261419. The reversal of 561261364 is 463162165.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 3050242 + ... + 3050425.

It is an arithmetic number, because the mean of its divisors is an integer number (85409352).

Almost surely, 2^561261364 is an apocalyptic number.

It is an amenable number.

561261364 is a deficient number, since it is larger than the sum of its proper divisors (463650860).

561261364 is a wasteful number, since it uses less digits than its factorization.

561261364 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6100694 (or 6100692 counting only the distinct ones).

The product of its digits is 25920, while the sum is 34.

The square root of 561261364 is about 23690.9553205437. The cubic root of 561261364 is about 824.8754579065.

The spelling of 561261364 in words is "five hundred sixty-one million, two hundred sixty-one thousand, three hundred sixty-four".