16543154420 has 24 divisors (see below), whose sum is σ = 37412980584. Its totient is φ = 6108241536.

The previous prime is 16543154399. The next prime is 16543154443. The reversal of 16543154420 is 2445134561.

It can be written as a sum of positive squares in 4 ways, for example, as 2892503524 + 13650650896 = 53782^2 + 116836^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31813499 + ... + 31814018.

It is an arithmetic number, because the mean of its divisors is an integer number (1558874191).

Almost surely, 2^16543154420 is an apocalyptic number.

16543154420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16543154420 is an abundant number, since it is smaller than the sum of its proper divisors (20869826164).

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

16543154420 is a wasteful number, since it uses less digits than its factorization.

16543154420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63627539 (or 63627537 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 35.

Adding to 16543154420 its reverse (2445134561), we get a palindrome (18988288981).

The spelling of 16543154420 in words is "sixteen billion, five hundred forty-three million, one hundred fifty-four thousand, four hundred twenty".