18616369860 has 768 divisors, whose sum is σ = 72924364800. Its totient is φ = 3881779200.

The previous prime is 18616369831. The next prime is 18616369867. The reversal of 18616369860 is 6896361681.

18616369860 is a `hidden beast` number, since 18 + 616 + 3 + 6 + 9 + 8 + 6 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a junction number, because it is equal to n+sod(n) for n = 18616369797 and 18616369806.

It is not an unprimeable number, because it can be changed into a prime (18616369867) by changing a digit.

It is a polite number, since it can be written in 255 ways as a sum of consecutive naturals, for example, 59477064 + ... + 59477376.

It is an arithmetic number, because the mean of its divisors is an integer number (94953600).

Almost surely, 2^18616369860 is an apocalyptic number.

18616369860 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 18616369860, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36462182400).

18616369860 is an abundant number, since it is smaller than the sum of its proper divisors (54307994940).

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

18616369860 is a wasteful number, since it uses less digits than its factorization.

18616369860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 409 (or 401 counting only the distinct ones).

The product of its (nonzero) digits is 2239488, while the sum is 54.

The spelling of 18616369860 in words is "eighteen billion, six hundred sixteen million, three hundred sixty-nine thousand, eight hundred sixty".