16645140336 has 80 divisors (see below), whose sum is σ = 46956066048. Its totient is φ = 5038924800.

The previous prime is 16645140277. The next prime is 16645140349. The reversal of 16645140336 is 63304154661.

It is a junction number, because it is equal to n+sod(n) for n = 16645140294 and 16645140303.

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, 529080 + ... + 559656.

Almost surely, 2^16645140336 is an apocalyptic number.

16645140336 is a gapful number since it is divisible by the number (16) 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 16645140336, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23478033024).

16645140336 is an abundant number, since it is smaller than the sum of its proper divisors (30310925712).

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

16645140336 is a wasteful number, since it uses less digits than its factorization.

16645140336 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31630 (or 31624 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 39.

Adding to 16645140336 its reverse (63304154661), we get a palindrome (79949294997).

The spelling of 16645140336 in words is "sixteen billion, six hundred forty-five million, one hundred forty thousand, three hundred thirty-six".