16630752138 has 128 divisors (see below), whose sum is σ = 44745523200. Its totient is φ = 3979653120.

The previous prime is 16630752133. The next prime is 16630752221. The reversal of 16630752138 is 83125703661.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a self number, because there is not a number n which added to its sum of digits gives 16630752138.

It is not an unprimeable number, because it can be changed into a prime (16630752133) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 3463063 + ... + 3467861.

It is an arithmetic number, because the mean of its divisors is an integer number (349574400).

Almost surely, 2^16630752138 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16630752138, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22372761600).

16630752138 is an abundant number, since it is smaller than the sum of its proper divisors (28114771062).

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

16630752138 is a wasteful number, since it uses less digits than its factorization.

16630752138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5412.

The product of its (nonzero) digits is 181440, while the sum is 42.

The spelling of 16630752138 in words is "sixteen billion, six hundred thirty million, seven hundred fifty-two thousand, one hundred thirty-eight".