16163399256 has 128 divisors (see below), whose sum is σ = 44346009600. Its totient is φ = 4890240000.

The previous prime is 16163399227. The next prime is 16163399261. The reversal of 16163399256 is 65299336161.

It is a happy number.

It is a super-2 number, since 2×16163399256² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 16163399199 and 16163399208.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1422076 + ... + 1433396.

It is an arithmetic number, because the mean of its divisors is an integer number (346453200).

Almost surely, 2^16163399256 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16163399256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22173004800).

16163399256 is an abundant number, since it is smaller than the sum of its proper divisors (28182610344).

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

16163399256 is a wasteful number, since it uses less digits than its factorization.

16163399256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11481 (or 11477 counting only the distinct ones).

The product of its digits is 1574640, while the sum is 51.

The spelling of 16163399256 in words is "sixteen billion, one hundred sixty-three million, three hundred ninety-nine thousand, two hundred fifty-six".