16858358500 has 48 divisors (see below), whose sum is σ = 36951877872. Its totient is φ = 6718944000.

The previous prime is 16858358483. The next prime is 16858358521. The reversal of 16858358500 is 585385861.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 8696681536 + 8161676964 = 93256^2 + 90342^2 .

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 77640 + ... + 199360.

It is an arithmetic number, because the mean of its divisors is an integer number (769830789).

Almost surely, 2^16858358500 is an apocalyptic number.

16858358500 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 16858358500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18475938936).

16858358500 is an abundant number, since it is smaller than the sum of its proper divisors (20093519372).

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

16858358500 is a wasteful number, since it uses less digits than its factorization.

16858358500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122017 (or 122005 counting only the distinct ones).

The product of its (nonzero) digits is 1152000, while the sum is 49.

The spelling of 16858358500 in words is "sixteen billion, eight hundred fifty-eight million, three hundred fifty-eight thousand, five hundred".