10865560644 has 45 divisors (see below), whose sum is σ = 28409627631. Its totient is φ = 3621228120.

The previous prime is 10865560613. The next prime is 10865560691. The reversal of 10865560644 is 44606556801.

The square root of 10865560644 is 104238.

It is a perfect power (a square), and thus also a powerful number.

10865560644 is a `hidden beast` number, since 1 + 0 + 86 + 5 + 560 + 6 + 4 + 4 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 10865560644.

It is an unprimeable number.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 1873389 + ... + 1879179.

Almost surely, 2^10865560644 is an apocalyptic number.

10865560644 is the 104238-th square number.

It is an amenable number.

10865560644 is an abundant number, since it is smaller than the sum of its proper divisors (17544066987).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

10865560644 is an frugal number, since it uses more digits than its factorization.

10865560644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11598 (or 5796 counting only the distinct ones).

The product of its (nonzero) digits is 691200, while the sum is 45.

The spelling of 10865560644 in words is "ten billion, eight hundred sixty-five million, five hundred sixty thousand, six hundred forty-four".