561001016 has 8 divisors (see below), whose sum is σ = 1051876920. Its totient is φ = 280500504.

The previous prime is 561000997. The next prime is 561001039. The reversal of 561001016 is 610100165.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 35062556 + ... + 35062571.

It is an arithmetic number, because the mean of its divisors is an integer number (131484615).

Almost surely, 2^561001016 is an apocalyptic number.

It is an amenable number.

561001016 is a deficient number, since it is larger than the sum of its proper divisors (490875904).

561001016 is a wasteful number, since it uses less digits than its factorization.

561001016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70125133 (or 70125129 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 20.

The square root of 561001016 is about 23685.4600124211. The cubic root of 561001016 is about 824.7478952987.

The spelling of 561001016 in words is "five hundred sixty-one million, one thousand, sixteen".