16639771840320 has 224 divisors, whose sum is σ = 55616309798400. Its totient is φ = 4203396163584.

The previous prime is 16639771840273. The next prime is 16639771840331. The reversal of 16639771840320 is 2304817793661.

It is a Harshad number since it is a multiple of its sum of digits (57).

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, 293033691 + ... + 293090469.

Almost surely, 2^{16639771840320} is an apocalyptic number.

16639771840320 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 16639771840320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27808154899200).

16639771840320 is an abundant number, since it is smaller than the sum of its proper divisors (38976537958080).

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

16639771840320 is a wasteful number, since it uses less digits than its factorization.

16639771840320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72885 (or 72875 counting only the distinct ones).

The product of its (nonzero) digits is 9144576, while the sum is 57.

The spelling of 16639771840320 in words is "sixteen trillion, six hundred thirty-nine billion, seven hundred seventy-one million, eight hundred forty thousand, three hundred twenty".