561116727849 has 4 divisors (see below), whose sum is σ = 748155637136. Its totient is φ = 374077818564.

The previous prime is 561116727841. The next prime is 561116727907. The reversal of 561116727849 is 948727611165.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 561116727849 - 2³ = 561116727841 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (561116727841) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 93519454639 + ... + 93519454644.

It is an arithmetic number, because the mean of its divisors is an integer number (187038909284).

Almost surely, 2^561116727849 is an apocalyptic number.

It is an amenable number.

561116727849 is a deficient number, since it is larger than the sum of its proper divisors (187038909287).

561116727849 is a wasteful number, since it uses less digits than its factorization.

561116727849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187038909286.

The product of its digits is 5080320, while the sum is 57.

The spelling of 561116727849 in words is "five hundred sixty-one billion, one hundred sixteen million, seven hundred twenty-seven thousand, eight hundred forty-nine".