561651055 has 16 divisors (see below), whose sum is σ = 771591744. Its totient is φ = 384468480.

The previous prime is 561651047. The next prime is 561651113. The reversal of 561651055 is 550156165.

It is not a de Polignac number, because 561651055 - 2³ = 561651047 is a prime.

It is a super-2 number, since 2×561651055² = 630903815165226050, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 561651055.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 7225 + ... + 34285.

It is an arithmetic number, because the mean of its divisors is an integer number (48224484).

Almost surely, 2^561651055 is an apocalyptic number.

561651055 is a deficient number, since it is larger than the sum of its proper divisors (209940689).

561651055 is a wasteful number, since it uses less digits than its factorization.

561651055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27666.

The product of its (nonzero) digits is 22500, while the sum is 34.

The square root of 561651055 is about 23699.1783612850. The cubic root of 561651055 is about 825.0663209616.

The spelling of 561651055 in words is "five hundred sixty-one million, six hundred fifty-one thousand, fifty-five".