16400828868 has 24 divisors (see below), whose sum is σ = 39932453568. Its totient is φ = 5229249696.

The previous prime is 16400828831. The next prime is 16400828881. The reversal of 16400828868 is 86882800461.

It is a super-2 number, since 2×16400828868² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 16400828868.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29711371 + ... + 29711922.

It is an arithmetic number, because the mean of its divisors is an integer number (1663852232).

Almost surely, 2^16400828868 is an apocalyptic number.

It is an amenable number.

16400828868 is an abundant number, since it is smaller than the sum of its proper divisors (23531624700).

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

16400828868 is a wasteful number, since it uses less digits than its factorization.

16400828868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59423323 (or 59423321 counting only the distinct ones).

The product of its (nonzero) digits is 1179648, while the sum is 51.

The spelling of 16400828868 in words is "sixteen billion, four hundred million, eight hundred twenty-eight thousand, eight hundred sixty-eight".