561678338904 has 32 divisors (see below), whose sum is σ = 1407531254640. Its totient is φ = 186781392000.

The previous prime is 561678338899. The next prime is 561678338909. The reversal of 561678338904 is 409833876165.

It is an interprime number because it is at equal distance from previous prime (561678338899) and next prime (561678338909).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561678338909) by changing a digit.

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, 27784747 + ... + 27804954.

Almost surely, 2^561678338904 is an apocalyptic number.

It is an amenable number.

561678338904 is an abundant number, since it is smaller than the sum of its proper divisors (845852915736).

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

561678338904 is a wasteful number, since it uses less digits than its factorization.

561678338904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55590131 (or 55590127 counting only the distinct ones).

The product of its (nonzero) digits is 26127360, while the sum is 60.

The spelling of 561678338904 in words is "five hundred sixty-one billion, six hundred seventy-eight million, three hundred thirty-eight thousand, nine hundred four".