28543341356421 has 32 divisors (see below), whose sum is σ = 39532070062080. Its totient is φ = 18305690222976.

The previous prime is 28543341356401. The next prime is 28543341356423. The reversal of 28543341356421 is 12465314334582.

It is not a de Polignac number, because 28543341356421 - 2⁶ = 28543341356357 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28543341356423) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 57545145 + ... + 58039041.

It is an arithmetic number, because the mean of its divisors is an integer number (1235377189440).

Almost surely, 2^{28543341356421} is an apocalyptic number.

It is an amenable number.

28543341356421 is a deficient number, since it is larger than the sum of its proper divisors (10988728705659).

28543341356421 is a wasteful number, since it uses less digits than its factorization.

28543341356421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 500953.

The product of its digits is 8294400, while the sum is 51.

The spelling of 28543341356421 in words is "twenty-eight trillion, five hundred forty-three billion, three hundred forty-one million, three hundred fifty-six thousand, four hundred twenty-one".