16400023356 has 96 divisors (see below), whose sum is σ = 41834383360. Its totient is φ = 4982814144.

The previous prime is 16400023333. The next prime is 16400023361. The reversal of 16400023356 is 65332000461.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 644385 + ... + 669351.

Almost surely, 2^16400023356 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 16400023356, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20917191680).

16400023356 is an abundant number, since it is smaller than the sum of its proper divisors (25434360004).

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

16400023356 is a wasteful number, since it uses less digits than its factorization.

16400023356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25103 (or 25101 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 30.

The spelling of 16400023356 in words is "sixteen billion, four hundred million, twenty-three thousand, three hundred fifty-six".