6521434120 has 16 divisors (see below), whose sum is σ = 14673226860. Its totient is φ = 2608573632.

The previous prime is 6521434103. The next prime is 6521434253. The reversal of 6521434120 is 214341256.

It can be written as a sum of positive squares in 2 ways, for example, as 6503777316 + 17656804 = 80646^2 + 4202^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 81517887 + ... + 81517966.

Almost surely, 2^6521434120 is an apocalyptic number.

It is an amenable number.

6521434120 is an abundant number, since it is smaller than the sum of its proper divisors (8151792740).

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

6521434120 is a wasteful number, since it uses less digits than its factorization.

6521434120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163035864 (or 163035860 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 28.

The square root of 6521434120 is about 80755.3968475173. The cubic root of 6521434120 is about 1868.3046890377.

Adding to 6521434120 its reverse (214341256), we get a palindrome (6735775376).

The spelling of 6521434120 in words is "six billion, five hundred twenty-one million, four hundred thirty-four thousand, one hundred twenty".