16330707978 has 64 divisors (see below), whose sum is σ = 35572690944. Its totient is φ = 4968000000.

The previous prime is 16330707971. The next prime is 16330707997. The reversal of 16330707978 is 87970703361.

It is a self number, because there is not a number n which added to its sum of digits gives 16330707978.

It is not an unprimeable number, because it can be changed into a prime (16330707971) 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, 9066678 + ... + 9068478.

It is an arithmetic number, because the mean of its divisors is an integer number (555823296).

Almost surely, 2^16330707978 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16330707978, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17786345472).

16330707978 is an abundant number, since it is smaller than the sum of its proper divisors (19241982966).

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

16330707978 is a wasteful number, since it uses less digits than its factorization.

16330707978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3071.

The product of its (nonzero) digits is 1333584, while the sum is 51.

The spelling of 16330707978 in words is "sixteen billion, three hundred thirty million, seven hundred seven thousand, nine hundred seventy-eight".