561878830854 has 48 divisors (see below), whose sum is σ = 1328144126400. Its totient is φ = 170257736880.

The previous prime is 561878830783. The next prime is 561878830859. The reversal of 561878830854 is 458038878165.

561878830854 is a `hidden beast` number, since 5 + 618 + 7 + 8 + 8 + 3 + 0 + 8 + 5 + 4 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 561878830791 and 561878830800.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561878830859) 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 23 ways as a sum of consecutive naturals, for example, 4658197 + ... + 4777295.

It is an arithmetic number, because the mean of its divisors is an integer number (27669669300).

Almost surely, 2^561878830854 is an apocalyptic number.

561878830854 is an abundant number, since it is smaller than the sum of its proper divisors (766265295546).

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

561878830854 is a wasteful number, since it uses less digits than its factorization.

561878830854 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142945 (or 142942 counting only the distinct ones).

The product of its (nonzero) digits is 51609600, while the sum is 63.

The spelling of 561878830854 in words is "five hundred sixty-one billion, eight hundred seventy-eight million, eight hundred thirty thousand, eight hundred fifty-four".