18568556860 has 144 divisors (see below), whose sum is σ = 45946414080. Its totient is φ = 6284718720.

The previous prime is 18568556803. The next prime is 18568556861. The reversal of 18568556860 is 6865586581.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 18568556795 and 18568556804.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18568556861) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 36915369 + ... + 36915871.

It is an arithmetic number, because the mean of its divisors is an integer number (319072320).

Almost surely, 2^18568556860 is an apocalyptic number.

18568556860 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18568556860, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22973207040).

18568556860 is an abundant number, since it is smaller than the sum of its proper divisors (27377857220).

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

18568556860 is a wasteful number, since it uses less digits than its factorization.

18568556860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 936 (or 927 counting only the distinct ones).

The product of its (nonzero) digits is 13824000, while the sum is 58.

The spelling of 18568556860 in words is "eighteen billion, five hundred sixty-eight million, five hundred fifty-six thousand, eight hundred sixty".