16400289600 has 252 divisors, whose sum is σ = 60172478080. Its totient is φ = 4232217600.

The previous prime is 16400289533. The next prime is 16400289617. The reversal of 16400289600 is 698200461.

16400289600 is a `hidden beast` number, since 1 + 6 + 40 + 0 + 2 + 8 + 9 + 600 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 428031 + ... + 464769.

Almost surely, 2^16400289600 is an apocalyptic number.

16400289600 is a gapful number since it is divisible by the number (10) 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 16400289600, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30086239040).

16400289600 is an abundant number, since it is smaller than the sum of its proper divisors (43772188480).

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

16400289600 is a wasteful number, since it uses less digits than its factorization.

16400289600 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36798 (or 36780 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The spelling of 16400289600 in words is "sixteen billion, four hundred million, two hundred eighty-nine thousand, six hundred".