16166820852 has 144 divisors (see below), whose sum is σ = 52944178560. Its totient is φ = 4039352064.

The previous prime is 16166820739. The next prime is 16166820853. The reversal of 16166820852 is 25802866161.

16166820852 is a `hidden beast` number, since 1 + 616 + 6 + 8 + 20 + 8 + 5 + 2 = 666.

It is a super-2 number, since 2×16166820852² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 16166820798 and 16166820807.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16166820853) 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, 67623 + ... + 192110.

Almost surely, 2^16166820852 is an apocalyptic number.

16166820852 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

16166820852 is an abundant number, since it is smaller than the sum of its proper divisors (36777357708).

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

16166820852 is a wasteful number, since it uses less digits than its factorization.

16166820852 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 259782 (or 259777 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 45.

The spelling of 16166820852 in words is "sixteen billion, one hundred sixty-six million, eight hundred twenty thousand, eight hundred fifty-two".