16447023216 has 400 divisors, whose sum is σ = 54020510720. Its totient is φ = 4783484160.

The previous prime is 16447023139. The next prime is 16447023233. The reversal of 16447023216 is 61232074461.

16447023216 is a `hidden beast` number, since 1 + 644 + 7 + 0 + 2 + 3 + 2 + 1 + 6 = 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 79 ways as a sum of consecutive naturals, for example, 382488891 + ... + 382488933.

Almost surely, 2^16447023216 is an apocalyptic number.

16447023216 is a gapful number since it is divisible by the number (16) 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 16447023216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27010255360).

16447023216 is an abundant number, since it is smaller than the sum of its proper divisors (37573487504).

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

16447023216 is an equidigital number, since it uses as much as digits as its factorization.

16447023216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143 (or 92 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 36.

Adding to 16447023216 its reverse (61232074461), we get a palindrome (77679097677).

The spelling of 16447023216 in words is "sixteen billion, four hundred forty-seven million, twenty-three thousand, two hundred sixteen".