561056019 has 4 divisors (see below), whose sum is σ = 748074696. Its totient is φ = 374037344.

The previous prime is 561056009. The next prime is 561056077. The reversal of 561056019 is 910650165.

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 561056019 - 2⁴ = 561056003 is a prime.

It is a super-2 number, since 2×561056019² = 629567712912256722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (561056009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 93509334 + ... + 93509339.

It is an arithmetic number, because the mean of its divisors is an integer number (187018674).

Almost surely, 2^561056019 is an apocalyptic number.

561056019 is a deficient number, since it is larger than the sum of its proper divisors (187018677).

561056019 is a wasteful number, since it uses less digits than its factorization.

561056019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 187018676.

The product of its (nonzero) digits is 8100, while the sum is 33.

The square root of 561056019 is about 23686.6210971510. The cubic root of 561056019 is about 824.7748483848.

The spelling of 561056019 in words is "five hundred sixty-one million, fifty-six thousand, nineteen".