16385749380 has 576 divisors, whose sum is σ = 67206537216. Its totient is φ = 3120768000.

The previous prime is 16385749357. The next prime is 16385749409. The reversal of 16385749380 is 8394758361.

16385749380 is a `hidden beast` number, since 1 + 6 + 38 + 574 + 9 + 38 + 0 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 38017765 + ... + 38018195.

It is an arithmetic number, because the mean of its divisors is an integer number (116678016).

Almost surely, 2^16385749380 is an apocalyptic number.

16385749380 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 16385749380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33603268608).

16385749380 is an abundant number, since it is smaller than the sum of its proper divisors (50820787836).

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

16385749380 is a wasteful number, since it uses less digits than its factorization.

16385749380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 688 (or 683 counting only the distinct ones).

The product of its (nonzero) digits is 4354560, while the sum is 54.

The spelling of 16385749380 in words is "sixteen billion, three hundred eighty-five million, seven hundred forty-nine thousand, three hundred eighty".