6455534881 has 4 divisors (see below), whose sum is σ = 6457967172. Its totient is φ = 6453102592.

The previous prime is 6455534873. The next prime is 6455534893. The reversal of 6455534881 is 1884355546.

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 3809358400 + 2646176481 = 61720^2 + 51441^2 .

It is a cyclic number.

It is not a de Polignac number, because 6455534881 - 2³ = 6455534873 is a prime.

It is a super-2 number, since 2×6455534881² = 83347861199615368322, which contains 22 as substring.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6455534801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1212160 + ... + 1217473.

It is an arithmetic number, because the mean of its divisors is an integer number (1614491793).

Almost surely, 2^6455534881 is an apocalyptic number.

It is an amenable number.

6455534881 is a deficient number, since it is larger than the sum of its proper divisors (2432291).

6455534881 is a wasteful number, since it uses less digits than its factorization.

6455534881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2432290.

The product of its digits is 2304000, while the sum is 49.

The square root of 6455534881 is about 80346.3432957593. The cubic root of 6455534881 is about 1861.9902849491.

The spelling of 6455534881 in words is "six billion, four hundred fifty-five million, five hundred thirty-four thousand, eight hundred eighty-one".