16544043420 has 48 divisors (see below), whose sum is σ = 47817627648. Its totient is φ = 4269430080.

The previous prime is 16544043419. The next prime is 16544043427. The reversal of 16544043420 is 2434044561.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16544043427) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4445464 + ... + 4449183.

It is an arithmetic number, because the mean of its divisors is an integer number (996200576).

Almost surely, 2^16544043420 is an apocalyptic number.

16544043420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16544043420 is an abundant number, since it is smaller than the sum of its proper divisors (31273584228).

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

16544043420 is a wasteful number, since it uses less digits than its factorization.

16544043420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8894690 (or 8894688 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 33.

Adding to 16544043420 its reverse (2434044561), we get a palindrome (18978087981).

The spelling of 16544043420 in words is "sixteen billion, five hundred forty-four million, forty-three thousand, four hundred twenty".