16655629440 has 128 divisors (see below), whose sum is σ = 53637736320. Its totient is φ = 4395663360.

The previous prime is 16655629429. The next prime is 16655629447. The reversal of 16655629440 is 4492655661.

It is a tau number, because it is divible by the number of its divisors (128).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a self number, because there is not a number n which added to its sum of digits gives 16655629440.

It is not an unprimeable number, because it can be changed into a prime (16655629447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 141525 + ... + 230955.

It is an arithmetic number, because the mean of its divisors is an integer number (419044815).

Almost surely, 2^16655629440 is an apocalyptic number.

16655629440 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 16655629440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26818868160).

16655629440 is an abundant number, since it is smaller than the sum of its proper divisors (36982106880).

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

16655629440 is an equidigital number, since it uses as much as digits as its factorization.

16655629440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89550 (or 89538 counting only the distinct ones).

The product of its (nonzero) digits is 1555200, while the sum is 48.

The spelling of 16655629440 in words is "sixteen billion, six hundred fifty-five million, six hundred twenty-nine thousand, four hundred forty".