16858493712 has 100 divisors (see below), whose sum is σ = 49249789776. Its totient is φ = 5566933440.

The previous prime is 16858493677. The next prime is 16858493713. The reversal of 16858493712 is 21739485861.

16858493712 is a `hidden beast` number, since 1 + 6 + 85 + 8 + 493 + 71 + 2 = 666.

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

It is not an unprimeable number, because it can be changed into a prime (16858493713) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 77887 + ... + 199457.

Almost surely, 2^16858493712 is an apocalyptic number.

16858493712 is a gapful number since it is divisible by the number (12) 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 16858493712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24624894888).

16858493712 is an abundant number, since it is smaller than the sum of its proper divisors (32391296064).

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

16858493712 is a wasteful number, since it uses less digits than its factorization.

16858493712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121698 (or 121683 counting only the distinct ones).

The product of its digits is 2903040, while the sum is 54.

The spelling of 16858493712 in words is "sixteen billion, eight hundred fifty-eight million, four hundred ninety-three thousand, seven hundred twelve".