561604207870 has 16 divisors (see below), whose sum is σ = 1043496851328. Its totient is φ = 217395177120.

The previous prime is 561604207867. The next prime is 561604207909. The reversal of 561604207870 is 78702406165.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 561604207870.

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, 905812929 + ... + 905813548.

It is an arithmetic number, because the mean of its divisors is an integer number (65218553208).

Almost surely, 2^561604207870 is an apocalyptic number.

561604207870 is a deficient number, since it is larger than the sum of its proper divisors (481892643458).

561604207870 is a wasteful number, since it uses less digits than its factorization.

561604207870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1811626515.

The product of its (nonzero) digits is 564480, while the sum is 46.

The spelling of 561604207870 in words is "five hundred sixty-one billion, six hundred four million, two hundred seven thousand, eight hundred seventy".