3534443394821 has 4 divisors (see below), whose sum is σ = 3538215480492. Its totient is φ = 3530671309152.

The previous prime is 3534443394743. The next prime is 3534443394857. The reversal of 3534443394821 is 1284933444353.

3534443394821 is digitally balanced in base 3, 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 1035163804900 + 2499279589921 = 1017430^2 + 1580911^2 .

It is a cyclic number.

It is not a de Polignac number, because 3534443394821 - 2¹⁰ = 3534443393797 is a prime.

It is a super-2 number, since 2×3534443394821² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3534443396821) 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, 1886041430 + ... + 1886043303.

It is an arithmetic number, because the mean of its divisors is an integer number (884553870123).

Almost surely, 2^{3534443394821} is an apocalyptic number.

It is an amenable number.

3534443394821 is a deficient number, since it is larger than the sum of its proper divisors (3772085671).

3534443394821 is an equidigital number, since it uses as much as digits as its factorization.

3534443394821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3772085670.

The product of its digits is 14929920, while the sum is 53.

The spelling of 3534443394821 in words is "three trillion, five hundred thirty-four billion, four hundred forty-three million, three hundred ninety-four thousand, eight hundred twenty-one".