561111060551 has 4 divisors (see below), whose sum is σ = 561331712352. Its totient is φ = 560890408752.

The previous prime is 561111060527. The next prime is 561111060589. The reversal of 561111060551 is 155060111165.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 561111060551 - 2¹⁸ = 561110798407 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 (561111063551) 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, 110322086 + ... + 110327171.

It is an arithmetic number, because the mean of its divisors is an integer number (140332928088).

Almost surely, 2^561111060551 is an apocalyptic number.

561111060551 is a deficient number, since it is larger than the sum of its proper divisors (220651801).

561111060551 is a wasteful number, since it uses less digits than its factorization.

561111060551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 220651800.

The product of its (nonzero) digits is 4500, while the sum is 32.

The spelling of 561111060551 in words is "five hundred sixty-one billion, one hundred eleven million, sixty thousand, five hundred fifty-one".