6521134455 has 192 divisors, whose sum is σ = 13344694272. Its totient is φ = 2914686720.

The previous prime is 6521134453. The next prime is 6521134489. The reversal of 6521134455 is 5544311256.

It is not a de Polignac number, because 6521134455 - 2¹ = 6521134453 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6521134453) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 63311934 + ... + 63312036.

It is an arithmetic number, because the mean of its divisors is an integer number (69503616).

Almost surely, 2^6521134455 is an apocalyptic number.

6521134455 is an abundant number, since it is smaller than the sum of its proper divisors (6823559817).

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

6521134455 is a wasteful number, since it uses less digits than its factorization.

6521134455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 298 (or 295 counting only the distinct ones).

The product of its digits is 72000, while the sum is 36.

The square root of 6521134455 is about 80753.5414393697. The cubic root of 6521134455 is about 1868.2760719120.

The spelling of 6521134455 in words is "six billion, five hundred twenty-one million, one hundred thirty-four thousand, four hundred fifty-five".