561100055 has 8 divisors (see below), whose sum is σ = 680886000. Its totient is φ = 443836096.

The previous prime is 561100037. The next prime is 561100073. The reversal of 561100055 is 550001165.

561100055 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (561100037) and next prime (561100073).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 561100055 - 2¹⁴ = 561083671 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 561100055.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 630005 + ... + 630894.

It is an arithmetic number, because the mean of its divisors is an integer number (85110750).

Almost surely, 2^561100055 is an apocalyptic number.

561100055 is a deficient number, since it is larger than the sum of its proper divisors (119785945).

561100055 is a wasteful number, since it uses less digits than its factorization.

561100055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1260993.

The product of its (nonzero) digits is 750, while the sum is 23.

The square root of 561100055 is about 23687.5506331913. The cubic root of 561100055 is about 824.7964260489.

The spelling of 561100055 in words is "five hundred sixty-one million, one hundred thousand, fifty-five".