16640235000 has 400 divisors, whose sum is σ = 58821202440. Its totient is φ = 4393440000.

The previous prime is 16640234999. The next prime is 16640235091. The reversal of 16640235000 is 53204661.

16640235000 is a `hidden beast` number, since 16 + 640 + 2 + 3 + 5 + 0 + 0 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 99 ways as a sum of consecutive naturals, for example, 73304887 + ... + 73305113.

Almost surely, 2^16640235000 is an apocalyptic number.

16640235000 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 16640235000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29410601220).

16640235000 is an abundant number, since it is smaller than the sum of its proper divisors (42180967440).

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

16640235000 is a wasteful number, since it uses less digits than its factorization.

16640235000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 446 (or 418 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

Adding to 16640235000 its reverse (53204661), we get a palindrome (16693439661).

The spelling of 16640235000 in words is "sixteen billion, six hundred forty million, two hundred thirty-five thousand".