16506444444 has 96 divisors (see below), whose sum is σ = 44912931840. Its totient is φ = 4620415488.

The previous prime is 16506444433. The next prime is 16506444463. The reversal of 16506444444 is 44444460561.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a junction number, because it is equal to n+sod(n) for n = 16506444396 and 16506444405.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3599377 + ... + 3603959.

It is an arithmetic number, because the mean of its divisors is an integer number (467843040).

Almost surely, 2^16506444444 is an apocalyptic number.

16506444444 is a gapful number since it is divisible by the number (14) 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 16506444444, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22456465920).

16506444444 is an abundant number, since it is smaller than the sum of its proper divisors (28406487396).

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

16506444444 is a wasteful number, since it uses less digits than its factorization.

16506444444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5459 (or 5457 counting only the distinct ones).

The product of its (nonzero) digits is 737280, while the sum is 42.

The spelling of 16506444444 in words is "sixteen billion, five hundred six million, four hundred forty-four thousand, four hundred forty-four".