16605238907904 has 352 divisors, whose sum is σ = 45089741283840. Its totient is φ = 5432432689152.

The previous prime is 16605238907903. The next prime is 16605238907909. The reversal of 16605238907904 is 40970983250661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16605238907903) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 22469876367 + ... + 22469877105.

It is an arithmetic number, because the mean of its divisors is an integer number (128095855920).

It is a 1-persistent number, because it is pandigital, but 2⋅16605238907904 = 33210477815808 is not.

Almost surely, 2^{16605238907904} 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 16605238907904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22544870641920).

16605238907904 is an abundant number, since it is smaller than the sum of its proper divisors (28484502375936).

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

16605238907904 is a wasteful number, since it uses less digits than its factorization.

16605238907904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1413 (or 1395 counting only the distinct ones).

The product of its (nonzero) digits is 19595520, while the sum is 60.

The spelling of 16605238907904 in words is "sixteen trillion, six hundred five billion, two hundred thirty-eight million, nine hundred seven thousand, nine hundred four".