561819054 has 16 divisors (see below), whose sum is σ = 1125315792. Its totient is φ = 186993408.

The previous prime is 561819047. The next prime is 561819101. The reversal of 561819054 is 450918165.

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 7 ways as a sum of consecutive naturals, for example, 65529 + ... + 73604.

It is an arithmetic number, because the mean of its divisors is an integer number (70332237).

Almost surely, 2^561819054 is an apocalyptic number.

561819054 is an abundant number, since it is smaller than the sum of its proper divisors (563496738).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

561819054 is a wasteful number, since it uses less digits than its factorization.

561819054 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139811.

The product of its (nonzero) digits is 43200, while the sum is 39.

The square root of 561819054 is about 23702.7225018562. The cubic root of 561819054 is about 825.1485763630.

The spelling of 561819054 in words is "five hundred sixty-one million, eight hundred nineteen thousand, fifty-four".