561055111079 has 4 divisors (see below), whose sum is σ = 561092572176. Its totient is φ = 561017649984.

The previous prime is 561055111061. The next prime is 561055111081. The reversal of 561055111079 is 970111550165.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 970111550165 = 5 ⋅194022310033.

It is a cyclic number.

It is not a de Polignac number, because 561055111079 - 2¹⁶ = 561055045543 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561055111979) 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, 18708074 + ... + 18738039.

It is an arithmetic number, because the mean of its divisors is an integer number (140273143044).

Almost surely, 2^561055111079 is an apocalyptic number.

561055111079 is a deficient number, since it is larger than the sum of its proper divisors (37461097).

561055111079 is a wasteful number, since it uses less digits than its factorization.

561055111079 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37461096.

The product of its (nonzero) digits is 47250, while the sum is 41.

The spelling of 561055111079 in words is "five hundred sixty-one billion, fifty-five million, one hundred eleven thousand, seventy-nine".