561341640 has 32 divisors (see below), whose sum is σ = 1684025280. Its totient is φ = 149691072.

The previous prime is 561341629. The next prime is 561341647. The reversal of 561341640 is 46143165.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 561341598 and 561341607.

It is not an unprimeable number, because it can be changed into a prime (561341647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2338804 + ... + 2339043.

It is an arithmetic number, because the mean of its divisors is an integer number (52625790).

Almost surely, 2^561341640 is an apocalyptic number.

It is an amenable number.

561341640 is an abundant number, since it is smaller than the sum of its proper divisors (1122683640).

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

561341640 is a wasteful number, since it uses less digits than its factorization.

561341640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4677861 (or 4677857 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 30.

The square root of 561341640 is about 23692.6494930390. The cubic root of 561341640 is about 824.9147827498.

The spelling of 561341640 in words is "five hundred sixty-one million, three hundred forty-one thousand, six hundred forty".