16653319640 has 64 divisors (see below), whose sum is σ = 39113746560. Its totient is φ = 6375006720.

The previous prime is 16653319609. The next prime is 16653319673. The reversal of 16653319640 is 4691335661.

It is a junction number, because it is equal to n+sod(n) for n = 16653319591 and 16653319600.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1952 + ... + 182511.

It is an arithmetic number, because the mean of its divisors is an integer number (611152290).

Almost surely, 2^16653319640 is an apocalyptic number.

16653319640 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 16653319640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19556873280).

16653319640 is an abundant number, since it is smaller than the sum of its proper divisors (22460426920).

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

16653319640 is a wasteful number, since it uses less digits than its factorization.

16653319640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 184572 (or 184568 counting only the distinct ones).

The product of its (nonzero) digits is 349920, while the sum is 44.

The spelling of 16653319640 in words is "sixteen billion, six hundred fifty-three million, three hundred nineteen thousand, six hundred forty".