3538239498821 has 4 divisors (see below), whose sum is σ = 3556200105612. Its totient is φ = 3520278892032.

The previous prime is 3538239498793. The next prime is 3538239498847. The reversal of 3538239498821 is 1288949328353.

3538239498821 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3477124737025 + 61114761796 = 1864705^2 + 247214^2 .

It is a cyclic number.

It is not a de Polignac number, because 3538239498821 - 2¹⁸ = 3538239236677 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3538239498221) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8980303100 + ... + 8980303493.

It is an arithmetic number, because the mean of its divisors is an integer number (889050026403).

Almost surely, 2^{3538239498821} is an apocalyptic number.

It is an amenable number.

3538239498821 is a deficient number, since it is larger than the sum of its proper divisors (17960606791).

3538239498821 is a wasteful number, since it uses less digits than its factorization.

3538239498821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17960606790.

The product of its digits is 89579520, while the sum is 65.

The spelling of 3538239498821 in words is "three trillion, five hundred thirty-eight billion, two hundred thirty-nine million, four hundred ninety-eight thousand, eight hundred twenty-one".