16644082455 has 288 divisors, whose sum is σ = 39914214912. Its totient is φ = 6227020800.

The previous prime is 16644082453. The next prime is 16644082493. The reversal of 16644082455 is 55428044661.

It is a happy number.

16644082455 is a `hidden beast` number, since 166 + 440 + 8 + 2 + 45 + 5 = 666.

It is not a de Polignac number, because 16644082455 - 2¹ = 16644082453 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 16644082455.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16644082451) by changing a digit.

It is a polite number, since it can be written in 287 ways as a sum of consecutive naturals, for example, 25179825 + ... + 25180485.

It is an arithmetic number, because the mean of its divisors is an integer number (138591024).

Almost surely, 2^16644082455 is an apocalyptic number.

16644082455 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

16644082455 is an abundant number, since it is smaller than the sum of its proper divisors (23270132457).

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

16644082455 is a wasteful number, since it uses less digits than its factorization.

16644082455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 759 (or 743 counting only the distinct ones).

The product of its (nonzero) digits is 921600, while the sum is 45.

The spelling of 16644082455 in words is "sixteen billion, six hundred forty-four million, eighty-two thousand, four hundred fifty-five".