561760366509 has 12 divisors (see below), whose sum is σ = 839412042300. Its totient is φ = 361592879424.

The previous prime is 561760366499. The next prime is 561760366511. The reversal of 561760366509 is 905663067165.

561760366509 is a `hidden beast` number, since 5 + 6 + 1 + 76 + 0 + 3 + 66 + 509 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 146512872900 + 415247493609 = 382770^2 + 644397^2 .

It is not a de Polignac number, because 561760366509 - 2¹⁵ = 561760333741 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561760366109) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1076169024 + ... + 1076169545.

It is an arithmetic number, because the mean of its divisors is an integer number (69951003525).

Almost surely, 2^561760366509 is an apocalyptic number.

It is an amenable number.

561760366509 is a deficient number, since it is larger than the sum of its proper divisors (277651675791).

561760366509 is a wasteful number, since it uses less digits than its factorization.

561760366509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2152338604 (or 2152338601 counting only the distinct ones).

The product of its (nonzero) digits is 6123600, while the sum is 54.

The spelling of 561760366509 in words is "five hundred sixty-one billion, seven hundred sixty million, three hundred sixty-six thousand, five hundred nine".