561780736830 has 48 divisors (see below), whose sum is σ = 1462639205664. Its totient is φ = 149602115520.

The previous prime is 561780736697. The next prime is 561780736859. The reversal of 561780736830 is 38637087165.

561780736830 is a `hidden beast` number, since 561 + 7 + 8 + 0 + 73 + 6 + 8 + 3 + 0 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4227561 + ... + 4358420.

It is an arithmetic number, because the mean of its divisors is an integer number (30471650118).

Almost surely, 2^561780736830 is an apocalyptic number.

561780736830 is an abundant number, since it is smaller than the sum of its proper divisors (900858468834).

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

561780736830 is a wasteful number, since it uses less digits than its factorization.

561780736830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8586721 (or 8586718 counting only the distinct ones).

The product of its (nonzero) digits is 5080320, while the sum is 54.

The spelling of 561780736830 in words is "five hundred sixty-one billion, seven hundred eighty million, seven hundred thirty-six thousand, eight hundred thirty".