561001116650 has 48 divisors (see below), whose sum is σ = 1123934943768. Its totient is φ = 207100800000.

The previous prime is 561001116589. The next prime is 561001116719. The reversal of 561001116650 is 56611100165.

561001116650 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 12 ways, for example, as 4623864001 + 556377252649 = 67999^2 + 745907^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3590150 + ... + 3743150.

Almost surely, 2^561001116650 is an apocalyptic number.

561001116650 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

561001116650 is an abundant number, since it is smaller than the sum of its proper divisors (562933827118).

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

561001116650 is a wasteful number, since it uses less digits than its factorization.

561001116650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158667 (or 158662 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 32.

The spelling of 561001116650 in words is "five hundred sixty-one billion, one million, one hundred sixteen thousand, six hundred fifty".