561016066055 has 4 divisors (see below), whose sum is σ = 673219279272. Its totient is φ = 448812852840.

The previous prime is 561016066027. The next prime is 561016066057. The reversal of 561016066055 is 550660610165.

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

It is not a de Polignac number, because 561016066055 - 2¹⁰ = 561016065031 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 (561016066057) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 56101606601 + ... + 56101606610.

It is an arithmetic number, because the mean of its divisors is an integer number (168304819818).

Almost surely, 2^561016066055 is an apocalyptic number.

561016066055 is a deficient number, since it is larger than the sum of its proper divisors (112203213217).

561016066055 is a wasteful number, since it uses less digits than its factorization.

561016066055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112203213216.

The product of its (nonzero) digits is 162000, while the sum is 41.

The spelling of 561016066055 in words is "five hundred sixty-one billion, sixteen million, sixty-six thousand, fifty-five".